Trust Onion alternatives

Tools that do what Trust Onion does, found by what they say they do rather than by shelf. Among the equally alike, the most used come first. Each line says how it differs from Trust Onion.

Read 2026-11-04 · Trust Onion itself: Free

With a free plan or free to use: GitHub, United States Postal Service, Cloudflare, Didit, Postman.

10 alternativesUnlike Trust Onion

#1
x401 Developer tools
Defines an HTTP handshake where a route demands signed identity proof and agents return a credential to retry.
Open source
Emerging
Active
#2
Twilio Developer tools MCP · open
Sends and receives SMS, email, and voice messages through APIs and manages customer conversations with AI.
More widely used
1.1M
Active
From $0.00 per use
2008
#3
GitHub Developer tools
Hosts Git repositories with pull requests, code review, issue tracking and Actions pipelines for building, testing and deploying code.
Also: Workflow automation, Code generationMore widely used
42M
Active
From $4/user/mo
2007
#4
United States Postal Service Developer tools MCP · open
Serves U.S. and Canadian postal code data, address validation and radius search through an API or downloadable databases.
More widely used
11.3M
Active
From $49/mo
2003
#5
Cloudflare Security MCP · open
Proxies website traffic through a global network for CDN caching, DNS, DDoS protection and a web firewall, plus Workers serverless code and zero-trust access.
Also: AgentsMore widely used
4.9M
Active
From $7/user/mo
2009
#6
AgenticTrust Developer tools
Publishes signed identity files and domain verification for AI agents to trust before calling business tools or APIs.
Same job
Emerging
#7
Didit Security MCP · sign-in
Verifies user identity through one API with document checks, face liveness, AML screening and transaction monitoring for KYC compliance.
More widely used
3.4k
Active
From $0.33 per use
2023
#8
GitLab Developer tools MCP · sign-in
Hosts source repositories, CI/CD pipelines and security scanning, with AI agents running under the same merge request approvals and audit trail.
Also: Workflow automation, SecurityMore widely used
591k
Active
2011
#9
Mxface.ai, AI enabled biometric API/SDKs Developer tools MCP · sign-in
Matches faces, irises and fingerprints through an API or on-premise SDK to verify identity and detect spoofing.
Can run on your servers
410
Active
#10
Postman Developer tools MCP · sign-in
Designs, tests, and manages APIs with integrated documentation, mocking, monitoring, and workflow automation.
More widely used
202k
Active
From $9/mo
2013

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How this list is made: the words Trust Onion is described with (what it does, for whom, what it is used for) are matched against every tool in the Atlas. A tool on the same shelf, or doing the same kind of work, counts for a little more. Nothing here is paid for.