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Contract-change decisions with signed, offline-verifiable receipts: a change to an API or MCP contract merges only with a grant bound to that exact change.

Which is more popular?
Based on our record, Optic seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | useoptic.com | coderifts.com |
| Pricing | ||
| Platforms | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Optic yet.
CodeRifts decides whether a change to an API or MCP contract may merge, and signs the decision. A GitHub App and a GitHub Action post two checks on every pull request that touches a contract file: CodeRifts / issuer and CodeRifts / contract-gate. Require both in branch protection, and a breaking...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Optic yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
2020 Norco Optic Review: Short on Travel, Not Capability | Pinkbike Field Test
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Optic and CodeRifts.
CodeRifts's answer:
A field rename broke a POS system across 19 restaurants for a week. The PR passed review, tests were green, nobody checked the contract. CodeRifts started as the check that catches this before merge. Then the author of the change stopped being a person: AI agents now propose and execute contract changes, and the question became not just "is this safe" but "was this authorized, and can you prove it later" — which is what the signed, offline-verifiable gate answers.
CodeRifts's answer:
Node.js and Express; Ed25519 signatures with a pinned public keyring; PostgreSQL on Railway; an MCP server with three tools listed in the official MCP Registry; the GitHub Apps and Checks API for merge enforcement; a JavaScript and Python receipt verifier (MIT); Cloudflare Pages for the site. Verified live with npx @coderifts/conformance.
CodeRifts's answer:
Every decision CodeRifts makes is an Ed25519-signed receipt that anyone can verify offline — no API key, no account, no CodeRifts server in the loop. The verdict is a named state (CONTINUE, CONTINUE_WITH_MONITORING, REQUEST_APPROVAL, STOP), not a score, and it ships with its own published limits: the "does not prove" statements served live at /.well-known/coderifts.json. Where authorization cannot be established, the answer is never an assumed yes.
CodeRifts's answer:
Diff tools tell you what changed in a contract. CodeRifts decides whether an AI agent may proceed with that change, spends a single-use grant on execution, and keeps the GitHub required check red until the grant exists — and the evidence survives us: the receipt verifies against a pinned key snapshot with a public MIT verifier. If your question is "who allowed that, and can I prove it without trusting the vendor's database", that is the difference.
CodeRifts's answer:
Three people. The one who runs AI agents in production and needs "who allowed that change" to be more than a log line they also control. The one adding a gate to an agent runtime who needs a state to branch on, not a score. And the one an auditor will ask, who needs evidence that survives the vendor. If none of these is you yet, you probably do not need this today.
CodeRifts's answer:
Share your experience with using Optic and CodeRifts. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


I'm really happy to say I've started a new job at Optic, and with this comes the learning process of getting more depth with new technology and its use cases. - Source: dev.to / over 5 years ago
Tracking CodeRifts since Mar 2026.
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