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Convex vs Fauna

Convex scores higher on the AgentReady, 61/100 against 20/100. They differ on 16 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Convex. The reactive backend platform that keeps up with you and your agents.

Fauna. Fauna is a distributed serverless database that combines document flexibility with relational power, automatic scaling, and zero operational overhead.

Where Convex is ahead

Convex passes clear canonical domain, clear product positioning, public docs discoverable, llms.txt published, llms-full.txt / full agent docs and machine-readable metadata, and Fauna does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: self-service signup, no mandatory sales call, agent-compatible signup flow, fast time to first request, copyable quickstart and cli available. Fauna misses those.

And on operate, canonical workflow succeeds, retry behavior documented, observable execution and agent compatibility verified. Fauna misses those.

What neither does

Both fail mcp discoverable, structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, mcp integration available, structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover. Convex leads 87 to 33. Convex misses mcp discoverable; Fauna misses clear canonical domain, clear product positioning, public docs discoverable, llms.txt published, llms-full.txt / full agent docs, mcp discoverable, machine-readable metadata.

Understand. Both sit at 23/100 here. Convex misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Fauna misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Convex leads 76 to 25. Convex misses programmatic credential creation, mcp integration available; Fauna misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available.

Operate is whether an agent can run against it in production and recover when a call fails. Convex leads 59 to 0. Convex misses structured, predictable output, machine-readable errors, idempotency support, rate-limit behavior predictable; Fauna misses canonical workflow succeeds, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified.

Pricing

Convex starts at $0/mo and has a free tier. Fauna starts at $150/mo with no free tier.

Signal by signal

Which to pick

Convex clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Convex and Fauna. Alternatives to each: Convex, Fauna.

An agent can fetch this as data: POST /v1/compare {"slugs": ["convex", "fauna"]}