European Alternatives to Postman
Looking for a European alternative to Postman? Postman, Inc. is headquartered at One Market Plaza in San Francisco, California, so the contract for its cloud workspaces is with a US company, although its trust page lists EU data residency as an option.
Eleven tools from companies in the United Kingdom, Switzerland, Luxembourg, the Netherlands, Austria, Spain, Sweden and France cover different parts of what Postman does: API clients, mock servers, HTTP debugging, API documentation and API management. They are not drop-in copies, and the page says which part each one replaces.
How we rank these tools — 4-step process
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European ownership, verified
The company is headquartered and incorporated in the EU, EEA or Switzerland, and processes customer data in Europe. A US parent company disqualifies a tool from this page regardless of where its servers are.
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Category fit and hands-on review
What the tool actually does, who it suits, and where it falls short — checked against the vendor’s own documentation, changelog and pricing page rather than its marketing copy.
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Compliance and pricing check
GDPR posture, hosting location and the prices quoted on this page are verified against the vendor’s public pricing before publication, and re-checked when we revisit the category.
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Position on this page
Placement on this page can be paid, and that can affect which tools appear here and the order they appear in. It never buys a good review: a tool that fails the checks above is not here at any price, and payment does not change the shortcomings we write about. A vendor can ask us to correct a factual error — not to remove a criticism.
Vendors can pay for visibility on this page. It never changes what an entry says about a product, including the criticism, and we earn nothing when you click through to a vendor. Paid placement can affect which tools appear here and the order they appear in. Editorial policy
11 European Alternatives to Postman
Sendhit
API client with end-to-end encrypted environment variables, Postman import, and a free first team seat
Kreya
Desktop API client for gRPC, REST, GraphQL and WebSocket, local-first, with a free plan
Hoppscotch
Open-source API client for REST, GraphQL and WebSocket, in the cloud or self-hosted, with a free plan
Voiden
Offline, Git-native API workspace where specs, docs, tests and requests live in Markdown files
Apiboo
Desktop app combining an API client, database manager and SSH, free to use locally without an account
RequestBite
Open-source web API client with webhook inspector and mock APIs, free plan and $6.99 per user
Mockoon
Free open-source desktop mock API server and CLI, with a self-hosted Pro team tier
HTTP Toolkit
Open-source tool to intercept, inspect, mock and rewrite HTTP traffic, from Barcelona
Bump.sh
API documentation and changelog platform built from OpenAPI and AsyncAPI, with a 14-day trial
Gravitee
API management platform from Lille covering design, gateway and developer portal
Tyk
London API gateway and management platform with a developer portal and an open-source core
Key takeaways
- Postman, Inc. is headquartered in San Francisco. Its terms could not be read at the source, so this page does not quote a governing law.
- Sendhit (UK), Kreya (Switzerland) and Hoppscotch (UK) are the closest to Postman's core: a request client with collections and environments, each with a free way to start.
- Voiden (Netherlands), Apiboo (Austria) and RequestBite (Sweden) are smaller, local-first clients with their own take on the workspace.
- Mockoon (Luxembourg), HTTP Toolkit (Spain) and Bump.sh (France) replace one slice each: mock servers, HTTP debugging and published API documentation.
- Gravitee (France) and Tyk (UK) are API management platforms, relevant if your Postman use is mostly governance and publishing rather than request testing.
Why people leave Postman
Postman is the tool most developers reach for when they need to send an API request, save it in a collection, share it with a team, mock a server, run tests and publish documentation.
It started as an API client and now sells itself as a platform. Its pricing page lists a Free plan, Solo at $9 a month, Team at $19 per user a month on annual billing, and Enterprise on request, with AI credits that scale from 50 to 800 a month.
It is run by Postman, Inc., headquartered at One Market Plaza in San Francisco, with offices in Bangalore and Tokyo.
For a team in Europe that means the cloud workspaces, where collections, environments and secrets sync, are a contract with a US company. Postman offers EU data residency and a private cloud option, according to its trust page. We could not read its terms of service, because that page loads in the browser, so we do not quote its governing law or dispute forum.
Postman is several products in one, and no single European tool replaces all of it. This page lists eleven that each replace a real part: six API clients, a mock server, an HTTP debugging proxy, an API documentation platform and two API management platforms. The right one depends on which part of Postman you actually use.
- Your shared workspace is a US contract Collections, environments and variables live in Postman cloud workspaces under an agreement with Postman, Inc. in San Francisco. Postman lists EU data residency as an option on its trust page, but residency is where data sits, not who you contract with. Several tools below are local-first, so your requests and secrets never leave the laptop unless you choose to sync them.
- Cloud-synced secrets are the sensitive part An API workspace holds tokens, keys and internal endpoints. Sendhit encrypts environment variables on the device before they reach its server, Kreya, Voiden and Apiboo work fully offline, and Hoppscotch can be self-hosted. If you would rather keep that material out of any vendor cloud, the European field here is better stocked than you might expect.
- Pricing has moved toward AI credits Postman now meters AI usage in monthly credits and charges per virtual-user-hour for cloud performance tests ($0.04), and Team SSO is a $6 per user add-on. Several tools here publish simpler prices: Sendhit is free for the first seat and €6 for each extra, RequestBite lists $6.99 and $12.99 per user with VAT included, and Hoppscotch lists $6 and $11 per user.
- You may only use a slice of the platform Many teams use Postman for the request client and a shared collection. For that, a smaller client is enough. If you use it mainly for mocks, documentation or gateway-style API management, a specialised tool such as Mockoon, Bump.sh or Gravitee is closer to the job than a general client.
What you have to replace, not just match
Write down which Postman features your team uses: requests and collections, environments, scripts and tests, the collection runner, mock servers, monitors, published documentation, or the API catalog. Importing collections is usually the easy part, since Sendhit, Kreya and Apiboo all describe a Postman import. Scripts are the hard part, because each tool has its own scripting model and none runs Postman scripts unchanged.
Move one project first. Export the collection and environments, import them into the new client, rerun the same requests against a staging API, and keep Postman available until the team has used the new tool for a sprint. Rotate any tokens that were stored in shared Postman environments once you have moved them.
The alternatives compared
| Position | Tool | Headquarters | Pricing | Jurisdiction |
|---|---|---|---|---|
| #11 | Tyk | London, United Kingdom | Open-source gateway free / Core, Professional and Enterprise plans priced on request (cloud, hybrid or self-managed) | United Kingdom (adequacy decision, outside the EEA) |
How each alternative compares to Postman
Sendhit
a Postman-style team client with encrypted variables and a free first seat
Best for: Small teams that want shared collections and environments, with secrets kept off the server in readable form
Sendhit is operated by District5 Ltd, registered in England and Wales under number 09960097 and shown at a Cardiff address in its terms. The terms are under the law of England and Wales with exclusive jurisdiction of its courts. The register lists a different address, in Fareham.
It is a native client for macOS, Windows and Linux with team workspaces and role-based access. Environment variables are encrypted on the device before they are sent to the server. Personal use is free, the first user of a team is free, and each additional member is €6 a month, billed monthly through Mollie.
It positions itself as a privacy-focused Postman alternative and describes easy migration of Postman collections. It is a client and workspace, not a platform with monitors, mocks or API catalog.
What Sendhit does better than Postman
- Environment variables are encrypted before they leave the device
- Free for the first seat and a flat €6 for each extra member
- Contracting company inside the UK legal system with English-law terms
- Describes Postman collection migration
Where Sendhit is a step down from Postman
- No monitors, mock servers or API catalog like Postman's
- The UK is outside the EU and EEA
- A much smaller product and community than Postman
Standout against Postman. Secrets are encrypted on your device before they sync to a shared team workspace.
Kreya
a local-first desktop client that handles gRPC well, from Switzerland
Best for: Developers who work with gRPC as well as REST and prefer Git over cloud sync
Kreya is a desktop API client from riok GmbH in Switzerland. Its terms are under Swiss law with St. Gallen as the exclusive venue, and payments run through Stripe. Switzerland is outside the EU but has its own data protection law.
It supports gRPC, REST, GraphQL, WebSocket and server-sent events, with an authentication vault covering OAuth 2.0, mTLS and AWS SigV4. Projects are plain files meant for Git, there is a CLI with JUnit output for CI, and it imports Postman, Insomnia, HAR and cURL.
The pricing page lists Free, Pro and Enterprise with a 10-day trial. The Free plan keeps only the latest request in history and leaves out scripting, testing and collections, so a team that depends on those needs a paid plan. We could not read the prices, so none are quoted.
What Kreya does better than Postman
- Strong gRPC support alongside REST, GraphQL and WebSocket
- Data stays local by default, with Git for sharing
- Command line and JUnit reports for CI
- Imports Postman collections
Where Kreya is a step down from Postman
- The free plan lacks scripting, testing and collections
- No hosted mocks, monitors or documentation
- Switzerland is outside the EU, and prices could not be verified
Standout against Postman. It treats gRPC as a first-class protocol and keeps projects as Git-friendly files.
Hoppscotch
the open-source web client, hosted or self-hosted, with a free plan
Best for: Teams that want an open-source Postman-style client they can run on their own server
Hoppscotch is offered by Hoppscotch Limited, a company registered in London (number 13343430). The terms and privacy pages we opened showed placeholder text, so we could not check the governing law or forum. The UK is outside the EU and EEA.
It supports REST, GraphQL and WebSocket requests, with personal workspaces, collections and pre-request scripts on the Free plan. The pricing page lists Business at $6 per user a month and Enterprise at $11, billed annually, adding shared environments, documentation publishing, mocking, SAML single sign-on, roles and audit logs. It can run in the cloud or self-hosted.
It is one of the most widely used open-source Postman alternatives, but a web-first tool does not replace every desktop-client workflow.
What Hoppscotch does better than Postman
- Open source and self-hostable
- Free plan with collections and scripts
- Low per-user prices for teams
- SAML and audit logs on the Enterprise plan at $11
Where Hoppscotch is a step down from Postman
- Its legal terms could not be read, so the governing law is unknown
- The UK is outside the EU and EEA
- Fewer testing and monitoring features than Postman
Standout against Postman. It is open source and runs either as a hosted service or on your own infrastructure.
Voiden
specs, docs, tests and requests as Markdown files in Git
Best for: Developer teams that already review everything through pull requests
Voiden is an offline, Git-native API workspace that stores specs, documentation, tests, mocks and requests as programmable Markdown. Its site says it needs no account, collects no telemetry and is open source, and the footer names ApyHub. ApyHub's terms name ApyHub B.V. in Eindhoven, under Dutch law with the courts of Amsterdam. We found no KvK number.
It is free to download. There is no cloud workspace in the Postman sense, so sharing and review happen in Git. That suits teams who want API definitions in the repository, and it asks more of those who prefer a visual shared workspace.
Voiden does not offer monitors, a hosted catalog or SSO, so it replaces the request-and-spec core of Postman rather than the platform.
What Voiden does better than Postman
- Works offline, with no account and no telemetry by its own statement
- API work lives as plain files that go through pull requests
- Open source and free
- Dutch company inside the EU
Where Voiden is a step down from Postman
- No hosted workspace, monitors or catalog
- The link between Voiden and ApyHub B.V. rests on its footer, and no registry number was found
- A new tool with a small ecosystem
Standout against Postman. Docs, tests, mocks and requests share one set of Markdown files that live in your Git repository.
Apiboo
an API client bundled with a database manager and SSH, from Austria
Best for: Individual developers who want one local app for APIs, databases and servers
Apiboo is run by Samin Sabahudin Grahich as a sole proprietorship in Wels, Austria (GISA 39850362, listed in its imprint). Its terms are under Austrian law, and EU consumers keep the courts of their home country. A sole trader is a thinner counterparty than a company, which matters for team contracts.
It combines a REST, GraphQL, gRPC, WebSocket and SSE client with a database manager for PostgreSQL, MySQL and SQLite, an SSH terminal, boards, documents and chat. Everything works locally without an account. Cloud sync, vault sync and team workspaces are paid, but the page shows no amounts.
It describes imports from Postman, Insomnia, Bruno, OpenAPI, HAR and cURL, plus mock servers, and an MCP server for AI agents. Treat it as a one-person tool for now.
What Apiboo does better than Postman
- Free local use without an account
- API client, database manager and SSH in one app
- Imports Postman collections by its own description
- Austrian entity inside the EU
Where Apiboo is a step down from Postman
- Run by a sole proprietor, not a company
- Paid plan prices are not shown on the page we read
- Many unrelated features, and a young product with a small user base
Standout against Postman. One local app covers the API client, the database and the server shell.
RequestBite
a local-first web client with webhook inspection and mock APIs
Best for: Developers who want a browser-based client and a webhook inspector at a low price
RequestBite is provided by Västerås Konsulterna AB, a Swedish company (org. no. 559192-8725). Its terms state that disputes are resolved in Sweden, and payments run through Paddle as merchant of record.
Slingshot, its API client, is open source and keeps data in your browser, with a proxy you can run yourself. The suite adds Inspector for debugging webhooks, Mock for mock APIs with generated OpenAPI documentation, and Tunnel for sharing localhost.
Its pricing page lists Free, Startup at $6.99 and Enterprise at $12.99 per user a month with VAT included. The Free plan allows 2 API projects and one mock API with 10 endpoints, so it is a trial of the paid features more than a team plan.
What RequestBite does better than Postman
- Open-source client with local-first storage
- Webhook inspector, mock APIs and tunnels in the same suite
- Low prices that include VAT
- Swedish company inside the EU
Where RequestBite is a step down from Postman
- Browser-based, so less suited to heavy desktop workflows
- The Free plan is small, with 2 projects and one mock
- Does not match Postman's testing and monitoring depth
Standout against Postman. A request client, webhook inspector, mock API and tunnel come from one small Swedish vendor.
Mockoon
the free, open-source mock server for the mock part of Postman
Best for: Teams that mainly use Postman for mock servers and want to run them locally or in CI
Mockoon is provided by 1kB SARL-S, a Luxembourg company (register number B257186), under Luxembourg law with exclusive venue in Luxembourg courts. Its site says it is built and operated in Europe and has no telemetry.
The desktop app and CLI are free and open source. They create mock REST APIs with OpenAPI support, dynamic templating, rules, proxy mode and request recording. Mockoon Pro adds self-hosted team collaboration at €10 per licence per month, with a minimum of five licences, excluding VAT, and a 14-day trial.
It is a mock server, not a client or test platform, so it replaces one slice of Postman and is best paired with another tool.
What Mockoon does better than Postman
- Free, open-source mock server that runs offline
- Luxembourg company under Luxembourg law
- Docker image and CLI for use in CI
- Published Pro price per licence
Where Mockoon is a step down from Postman
- Does not send and test requests like a full API client
- Pro is self-hosted only and starts at five licences
- No documentation, monitoring or catalog
Standout against Postman. It gives you Postman-style mock servers as a free, offline, open-source application.
HTTP Toolkit
an HTTP debugging proxy with mocking, from Barcelona
Best for: Developers who debug traffic from apps and services as much as they send manual requests
HTTP Toolkit is provided by Toolshed Labs SLU (ES-B19847946), at a Barcelona address, under Spanish law. It describes itself as an open-source tool for debugging, testing and building with HTTP.
It intercepts HTTP(S) traffic from browsers, mobile devices and services with one click, lets you inspect and filter it, and pause and edit live requests. Hobbyist is free and open source. Professional adds automated mocking, reusable rules, import and export, and API validation, and the page offers 25% off for annual billing. We could not read the prices.
It is a debugging tool first. It can send custom requests, but it does not offer Postman's collections, shared workspaces or test runner.
What HTTP Toolkit does better than Postman
- Intercepts live traffic from apps and services, which Postman does not do
- Free open-source Hobbyist tier
- Spanish company inside the EU
- Mock rules and request rewriting
Where HTTP Toolkit is a step down from Postman
- Not a collection-based client for shared API workflows
- Team workspaces are listed as coming soon
- Professional prices could not be verified
Standout against Postman. It is the one that captures and edits real traffic from the app you are debugging.
Bump.sh
the documentation and changelog part of Postman, from Angers
Best for: Teams that publish OpenAPI or AsyncAPI documentation and want breaking-change detection
Bump.sh is operated by It ducks SAS, 25 rue Lenepveu in Angers, France (R.C.S. Angers 831116330). Its legal notice names Heroku, Inc. in San Francisco as host, so the infrastructure is not European by default, though its homepage offers EU data residency for enterprise.
It generates documentation portals and changelogs from OpenAPI, AsyncAPI and Arazzo, with Git-based workflows, pull request previews, breaking-change detection and a managed MCP server feature. The pricing page lists Basic at $50 a month and Pro at $120, with a 14-day trial and no permanent free plan.
It replaces Postman's published documentation, not its request client, tests or mocks.
What Bump.sh does better than Postman
- Documentation and automatic changelogs built from specs
- Breaking-change detection in pull requests
- French company inside the EU
- Human support on every plan, by its own statement
Where Bump.sh is a step down from Postman
- No request client, tests or mocks
- Hosted on a US provider by default
- No permanent free plan, and priced in US dollars
Standout against Postman. It turns an OpenAPI file into a documentation site with a changelog that flags breaking changes.
Gravitee
French API management for the governance side of Postman
Best for: Organisations that manage, secure and publish many APIs and run a developer portal
Gravitee's license agreement lists GraviteeSource SAS in Lille as the contracting entity for the EEA, under French law with the International Chamber of the Commercial Court of Paris. Customers in the Americas contract with GraviteeSource, Inc. in Delaware. Its privacy notice, however, names Gravitee Topco Limited in London as controller.
It is an open-source API management platform covering design, gateway, developer portal and monitoring, with self-hosted, hybrid and SaaS options. The API Management plan Planet is listed at $2,500 a month for one production gateway, with higher tiers on request.
That is a different buyer from a developer with a request client. It overlaps with Postman's API catalog and governance features, not its testing.
What Gravitee does better than Postman
- Gateway, portal and governance in one platform
- EEA customers contract with a French company under French law
- Self-hosted, hybrid and SaaS deployment
- Open-source core
Where Gravitee is a step down from Postman
- Not a request client or test tool
- Priced for organisations, starting at $2,500 a month
- UK holding company named as privacy controller
Standout against Postman. EEA customers sign with GraviteeSource SAS in Lille, under French law.
- Which law reaches it. United Kingdom (adequacy decision, outside the EEA). Postman is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Source code. Open source, where Postman is not: you can read what it does rather than take the description on trust.
Best for: Teams that want a self-managed gateway and portal, with an open-source core
Tyk is provided by Tyk Technologies Limited, registered in London (company number 09727592). We did not read its customer terms, which are published as a PDF, so we cannot quote its governing law. The UK is outside the EU and EEA.
It is an API gateway and management platform with a developer portal, governance and observability. The gateway is open source under Apache 2.0, it supports self-managed and air-gapped deployments, and its site offers a free trial of its cloud. Core, Professional and Enterprise plans are priced on request.
Like Gravitee, it overlaps with Postman's API catalog and governance side, not its request client.
What Tyk does better than Postman
- Open-source Apache 2.0 gateway you can self-manage
- Self-managed and air-gapped deployment options
- Developer portal and governance in the platform
- Free trial and open-source code to evaluate
Where Tyk is a step down from Postman
- Not a request client or test tool
- Prices are not published
- The UK is outside the EU and EEA, and its terms could not be read
Standout against Postman. The gateway itself is open source and can run entirely on your own infrastructure.
What actually breaks when you switch
Collections move, scripts do not. Postman scripts use its own sandbox API, and every client here has a different scripting model or none. Budget time to rewrite pre-request and test scripts, and keep Postman for any team that depends on monitors or Flows until you have an answer for them.
Check what the free plans leave out. Kreya's Free plan has no scripting, testing or collections, RequestBite's allows 2 projects and one mock, and Bump.sh has no permanent free plan. Compare the plan you would actually need, not the headline free tier.
Several of these are small or new, and two are run by individuals or a very small company. For a production workflow, weigh how long the product has existed and how easily you could export your data, and prefer tools that keep projects as plain files in Git.
Which one is closest to Postman for everyday request testing?
Sendhit and Hoppscotch are the nearest in shape: a request client with collections, environments and team workspaces. Sendhit adds end-to-end encrypted environment variables and a free first seat, and Hoppscotch is open source and can be self-hosted. Kreya is the pick if you work with gRPC as well as REST.
None of them matches the breadth of Postman's monitors, Flows and API catalog. Decide whether you need those before you compare prices.
Which of these keeps my data off a vendor cloud?
Kreya, Voiden and Apiboo describe local-first or offline operation, and Voiden and Mockoon are open source. Hoppscotch can be self-hosted, and RequestBite's proxy can be run yourself. You then control where collections and secrets are stored, and a Git repository becomes the sharing mechanism.
Syncing and team features usually need an account, and then the contract with the vendor applies again, so read the terms of the plan you intend to use.
Do any of these replace Postman mock servers, documentation or monitoring?
Mockoon is a dedicated mock server, free and open source, with a Pro tier for self-hosted team use. RequestBite includes mock APIs in its plans, and Voiden stores mocks beside specs and tests. Bump.sh generates documentation and changelogs from OpenAPI and AsyncAPI.
We found no European tool in this group that replaces Postman monitors one to one. For scheduled checks, plan to use a separate uptime or synthetic-testing service.
Are Gravitee and Tyk real alternatives?
Only for part of Postman. They are API management platforms, with a gateway, a developer portal and governance, not request clients. They fit if you use Postman mostly to publish and govern APIs. They do not fit if you use it to test endpoints by hand.
Tyk's gateway is open source, and Gravitee offers self-hosted, hybrid and SaaS options. Both are priced for organisations, not individuals.
Which one to pick
For everyday request testing with a shared workspace, start with Sendhit if encrypted team variables and a free first seat appeal, Hoppscotch if you want open source you can host yourself, and Kreya if you work with gRPC. Voiden suits teams that want API work in the repository, and Apiboo and RequestBite suit individual developers.
If you mainly use Postman for one slice, go to the specialist: Mockoon for mock servers, HTTP Toolkit for debugging real traffic, Bump.sh for published documentation. If you use it to govern and publish many APIs, Gravitee and Tyk are the relevant platforms, with different buyers from the request clients.
Be realistic about the gap. Postman has monitors, Flows, an API catalog and a very large public network of APIs, and none of the eleven tools matches all of that. Switch if you want a European or EEA contracting party, local-first secrets, or simpler prices, and keep Postman where its breadth is the reason you chose it.
Frequently Asked Questions
There is no single best one, because Postman covers a lot. For a request client with collections and team workspaces, Sendhit, Kreya and Hoppscotch lead this list on how easy they are to try and how clearly they publish prices. Choose Kreya if you use gRPC, Hoppscotch if you want to self-host, and Sendhit if encrypted shared variables matter. For mocks, documentation or API management, the specialised tools lower down are closer.
No. Postman, Inc. is headquartered at One Market Plaza in San Francisco, California, and also has offices in Bangalore and Tokyo. Its trust page says it offers EU data residency. Its terms page loads in the browser, so we did not read its governing law.
Its pricing page lists a Free plan, Solo at $9 a month, Team at $19 per user a month on annual billing, and Enterprise on request. Team SSO is an add-on at $6 per user a month, and cloud performance testing is billed at $0.04 per virtual-user-hour. AI credits are included per plan: 50 on Free, 400 on Solo and Team, and 800 per user, pooled, on Enterprise.
Sendhit is free for personal use and for the first seat of a team, with €6 for each additional member, billed monthly. RequestBite lists Free, Startup at $6.99 and Enterprise at $12.99 per user a month with VAT included. Hoppscotch lists a Free plan, Business at $6 and Enterprise at $11 per user a month on annual billing. Prices may change, so check the vendor pages.
The desktop application and command-line tool are free and open source. Mockoon Pro for teams is self-hosted and lists €10 per licence per month with a minimum of five licences, excluding VAT, with a 14-day trial. Enterprise is priced on request.
It has no permanent free plan. Its pricing page lists Basic at $50 a month and Pro at $120 a month, with a 14-day trial of Pro, and a custom plan for larger needs. Bump.sh is operated by It ducks SAS in Angers, France, although its legal notice names Heroku in the US as its host, so check where your documentation data is stored.
Sendhit is District5 Ltd (England and Wales). Kreya is riok GmbH (Switzerland, St. Gallen venue). Hoppscotch is Hoppscotch Limited (London). Voiden is offered by ApyHub B.V. (Eindhoven). Apiboo is a sole proprietorship in Wels, Austria. RequestBite is Västerås Konsulterna AB (Sweden). Mockoon is 1kB SARL-S (Luxembourg). HTTP Toolkit is Toolshed Labs SLU (Barcelona). Bump.sh is It ducks SAS (Angers). Gravitee contracts with GraviteeSource SAS (Lille) for EEA customers. Tyk is Tyk Technologies Limited (London).
Sendhit, Kreya and Apiboo each describe Postman import on their own sites, and RequestBite and Slingshot state Postman collection import and export. Collections move over easily, but scripts and monitors usually need to be rewritten.
Hoppscotch, Voiden, Mockoon, HTTP Toolkit and RequestBite's Slingshot client describe themselves as open source, and Tyk's gateway is Apache 2.0. Gravitee describes itself as open-source API management. Kreya, Sendhit and Apiboo are not described as open source on the pages we read.
Kreya is contracted in Switzerland, and Sendhit, Hoppscotch and Tyk in the United Kingdom. The others are inside the EU: Luxembourg, the Netherlands, Austria, Sweden, Spain and France. Gravitee's EEA contract is French, though its privacy notice names a UK holding company as controller.
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