ProtoMap

★★★★☆4.3 / 5 editorial Freemium Free self-hosted version for one machine; cloud and on-premises plans for organizations (pricing on request).

A live map of your APIs for AI coding agents.

✓ Editor-researched listing — details reviewed by Grab AI Tool editors; pricing re-checked regularly.

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What is ProtoMap?

ProtoMap is a context engine that maps every gRPC service and Protobuf message across your repositories, then hands that map to engineers and AI coding agents. Instead of burning tokens while an agent greps through repos to rediscover who calls what, ProtoMap answers in plain English or over MCP: callers, dependencies, call sites, and field-level data flows, refreshed on every commit. Its own benchmark on nine gRPC repositories with five million lines of code showed Claude Code answering with 13 times fewer tokens and 7.7 times faster, at the same accuracy.

It launched on November 9, 2026 and took the number one spot on Product Hunt the same day. The self-hosted version is free on a single machine and runs in Docker with your source code staying in your own environment, while cloud and on-premises versions keep the graph fresh across a whole organization through CI. It plugs into Claude Code, Codex, and Antigravity through MCP, so the agent you already use queries the map instead of re-reading your codebase.

Who ProtoMap Is Best For

Best for: ProtoMap suits developers and engineering teams especially well: Number one Product of the Day on Product Hunt at launch (November 9, 2026); its benchmark showed 13x fewer tokens and 7.7x faster answers from Claude Code. The free plan makes it easy to try on real work before paying anything.

Not ideal for: It may not suit you if any of these are dealbreakers: built specifically for gRPC and Protobuf codebases, so teams on REST or GraphQL get little from it; self-hosting needs Docker, at least 4 GB of RAM, and 20 GB of disk space.

Key Features

Maps every gRPC service, Protobuf message, caller, and dependency across repositories
Plain-English queries for engineers and an MCP server for coding agents
Deterministic Rust scanner that refreshes the graph on every commit
Field-level dataflows show exactly where each field is used
Free self-hosted version that runs locally in Docker

Pros

Number one Product of the Day on Product Hunt at launch (November 9, 2026)
Its benchmark showed 13x fewer tokens and 7.7x faster answers from Claude Code
Free self-hosted tier keeps your source code entirely in your own environment

Cons

Built specifically for gRPC and Protobuf codebases, so teams on REST or GraphQL get little from it
Self-hosting needs Docker, at least 4 GB of RAM, and 20 GB of disk space
Organization-wide cloud and on-premises pricing is not published, so larger teams must ask for a quote

Pricing

Model: Freemium
Free self-hosted version for one machine; cloud and on-premises plans for organizations (pricing on request).

Adding Up Your AI Bill?

If you pay for ProtoMap alongside other AI subscriptions, the monthly total adds up quietly. Tick every tool you pay for in our free AI Tool Cost Calculator to see your real monthly and yearly bill — and spot overlaps you can cut. Still choosing? Start with our guide on how to choose the right AI tool.