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Open Kioku vs OpenCode

Which one should you try?

Open Kioku

Free

Best for AI coding agents using MCP clients

Visit Open Kioku See full review

OpenCode

Free

Best for Developers who want an open-source coding agent in the terminal

Visit OpenCode See full review

Pricing, capabilities and platforms side by side. Prices are as of the "Pricing checked" date in the table.

Open Kioku

Open Kioku

Open Kioku indexes a repository into a local SQLite and Tantivy store, then exposes that index to MCP clients — Claude Code, Cursor, Codex — so agents build structured, evidence-backed plans before touching a single file. The pre-edit plan names exact file ranges, affected symbols, caller graphs, and validation candidates. The post-edit verify step checks that changes stayed inside the declared boundary. No source leaves the machine; write tools stay gated unless you explicitly unlock them. The ceiling arrives when the repo or language falls outside what the local indexer can parse — at that point the graph edges simply are not there, and the agent falls back to inference.

OpenCode

OpenCode

OpenCode is an MIT-licensed AI coding agent for the terminal that works with the model provider you choose, including local models. We installed it and ran three agent tasks: 9 of 9 passed with Claude Opus 5.5, 3 of 9 with a 3B local model.

AttributeOpen KiokuOpenCode
PricingFreeFree
Price—Free (MIT). Optional Zen models pay as you go; Go $10/mo, Go Plus $40/mo
Pricing checkedNot checked yetOct 19, 2026
Free trialNot statedNot stated
Open sourceYesYes
Has APINoYes
Self-hosted optionYesYes
Platformsnpm, local CLITerminal, Desktop (beta macOS/Windows/Linux), IDE extension
Pros
  • Local SQLite and Tantivy index with no source upload, so repositories under data-residency constraints or containing unreleased code never leave the machine — the class of hosted-index compliance problems does not arise.
  • Symbol-resolution and graph-edge tracing replace text-match inference for impact analysis, which means an agent planning a token-expiration change gets the actual callers and affected modules instead of a list of files that contain the string.
  • Pre-edit plans include explicit allowed and forbidden file boundaries, so the agent is told what is out of scope before it starts — reducing the drift where an edit intended for two files touches six.
  • Validation candidates are selected before the edit begins rather than after, so the agent runs the right tests against the right change instead of discovering the gap in the CI failure.
  • MCP stdio transport connects to Claude Code, Cursor, and Codex without a dedicated plugin per client, so one local index serves multiple agent surfaces from a single install.
  • Passed all 9 of our agent tasks with Claude Opus 5.5.
  • Works with the provider you choose, including a local model behind an OpenAI-compatible server.
  • Open source under the MIT license.
Cons
  • Language coverage determines graph completeness: repositories mixing a supported language with an unsupported one produce incomplete impact traces for the unsupported files, and the agent reverts to text-match inference for those paths — which is the same baseline the tool exists to replace. Teams with polyglot monorepos check the language support list before committing to the workflow.
  • There is no API and no hosted option, which means teams building CI pipelines or cloud-based agent workflows that cannot run a local process have no path to integrate Open Kioku — those teams evaluate hosted code intelligence services that accept repository uploads instead.
  • The index must be rebuilt or re-run after significant repository changes; the docs describe no incremental or watch-mode indexing, so teams with high-commit-velocity repositories that need fresh graph edges before every agent run carry a re-index step as an explicit pipeline cost.
  • With a 3B local model it passed 3 of 9 tasks (only the simplest one), so plan on a larger model.
  • It reaches out to models.opencode.ai and registry.npmjs.org, and downloads provider packages on first use, so offline setups need those pre-installed.
  • The vendor lists its desktop app as beta.

Made up your mind?

Open Kioku

Free

Best for AI coding agents using MCP clients

Visit Open Kioku See full review

OpenCode

Free

Best for Developers who want an open-source coding agent in the terminal

Visit OpenCode See full review

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Specs come from each tool's own site and docs (how we test). AIDiveForge is editorially independent.

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