What is ByteRover?
ByteRover gives coding agents such as Claude Code, Codex, OpenCode, OpenClaw and Hermes a memory of your project's decisions, conventions and gotchas. Knowledge is written as topic files in a folder tree (domain, topic, subtopic) rather than as vectors in a database, so a person can open and read it.
The product changed shape in 2026. The open CLI, brv (formerly Cipher), was licensed under Elastic 2.0, last released as 3.16.1 in May 2026, and its GitHub repository was archived on 27 September 2026. Version 4 replaces it with ByteRover Desktop, which needs a Google or GitHub sign-in, plus a skill installed in each agent; memory is organised into private and team spaces that sync through ByteRover's cloud.
ByteRover's April 2026 research paper reports 96.1% on LoCoMo and 92.8% on LongMemEval-S, from its own test harness.
Is ByteRover worth it?
You explain to your coding agent that the payments service must never call the database directly. Tomorrow, in a new session, you explain it again. Multiply that by a team of five and a lot of every week goes on repeating yourselves.
ByteRover writes those lessons down for the agent. After useful work, the agent records a decision, the reason and any gotchas as a topic file in a tree; before the next job, it queries the tree and cites what it finds. A periodic Dream step suggests topics to merge, link or prune, but changes nothing until the agent acts. Because memory is plain files rather than numbers in a vector database, you can read exactly what your agent believes.
The headline numbers come from ByteRover's own paper. It reports 96.1% on LoCoMo against 89.9% for Honcho and 66.9% for Mem0, run through its harness with Gemini 3 Flash as the judge, and 92.8% on LongMemEval-S, where most rival figures were copied from other papers that used different models. The paper also promises answers in under 100 ms, but its own measurements, with caches switched off, show a cold query taking 1.2 to 1.6 seconds at the median and up to 2.3 seconds at p95.
The catch: the paper describes the brv CLI, and that CLI has been retired. Its open repository was archived on 27 September 2026, and version 4 asks you to sign in to a desktop app, create spaces and let them sync through ByteRover's servers. The free plan caps cloud sync at 100 context files, which a busy project can fill quickly; Pro is 15 a month billed yearly, with no currency shown. Self-hosting now means the Enterprise on-premises plan. Hermes Agent dropped its built-in ByteRover provider from core on 15 October 2026.
Our take: ByteRover is a well-kept notebook your agents share, and the notebook idea is sound. The company behind it has just changed the binding, though, so a team should wait a release or two before moving its project memory in.
Where it earns its place
A five-person startup team using Claude Code and Codex side by side
Stop re-explaining architecture decisions to every new agent session
Create a team space in ByteRover Desktop, bind the repository to it and let agents record decisions after each task. Viewers can read the space without changing it; Pro at 15 a month billed yearly removes the 100-file cap.
A digital agency running agents across a dozen client codebases
Keep each client's conventions separate and shareable with that client's developers
One private or team space per client, shared by email with Viewer or Editor roles. Spaces are the memory boundary, so an agent bound to one client's folder queries and records only in that client's space.
A developer still running the archived brv 3.x CLI on a VPS
Keep existing project memory after the CLI was retired
ByteRover's migration guide converts each V3 project in .brv/context-tree into a V4 space after you authenticate, and backs up the old folder to ~/Documents/ByteRover_Backups before deleting it.
Before you commit
- Setup
- Download ByteRover Desktop, sign in with Google or GitHub, connect an agent (the app installs the skill), then type 'onboard with ByteRover' in the agent. On a server, npx skills add campfirein/skills with Node.js 20 or newer.
- Integrations
- Claude Code, Codex CLI, OpenCode, OpenClaw (with a context-engine script) and Hermes. The old V3 CLI also exposed brv-query and brv-curate as MCP tools; an OpenAPI spec is published.
- Data and privacy
- Memory is written to your machine and synced to ByteRover's cloud for team spaces; the pricing page lists SOC 2 only under Enterprise, while Hermes's docs describe the cloud sync as SOC 2 Type II. Retention and training-use terms are not published on the pricing page.
- Cost at scale
- Free covers 100 synced context files; Pro is 15 a month billed yearly with unlimited files. Per-seat pricing for teams is not published; Enterprise adds SSO, RBAC and on-premises deployment by quote.
- Limits
- Version 4 requires an account even for local use. Benchmarked retrieval used an LLM for harder queries, adding seconds; the V4 query script returns ranked text matches. The paper's caches were disabled in evaluation.
What’s good
- Memory stored as readable topic files, not opaque vectors
- Highest self-reported LoCoMo score in its comparison, 96.1%
- Team spaces with Viewer, Editor and Admin roles
- Works with Claude Code, Codex, OpenCode, OpenClaw and Hermes
What’s not
- Open CLI archived; version 4 needs a sign-in and desktop app
- Benchmarks are self-run, partly against copied numbers
- Measured cold-query latency is over a second, not under 100 ms
- Free plan syncs only 100 context files
Best for
Small development teams that want their coding agents to share written project knowledge and are comfortable with a young, cloud-synced product.
ByteRover alternatives
ByteRover: common questions
- Is ByteRover worth it?
- ByteRover reports a 96.1% LoCoMo score and keeps memory in files you can read, but it has just traded its open CLI for a sign-in desktop app, and that move makes it a harder bet than its numbers suggest. We rate it 3.4 out of 5.
- How much does ByteRover cost?
- Free (100 context files synced to the cloud, team sharing); Pro 15 a month billed yearly with unlimited context files (the pricing page shows no currency symbol); Enterprise custom, with SOC 2, SSO, RBAC and on-premises deployment.
- What are the downsides of ByteRover?
- Open CLI archived; version 4 needs a sign-in and desktop app; benchmarks are self-run, partly against copied numbers; measured cold-query latency is over a second, not under 100 ms; free plan syncs only 100 context files.
- Who is ByteRover best for?
- Small development teams that want their coding agents to share written project knowledge and are comfortable with a young, cloud-synced product.
- How much does ByteRover cost for a team or in production?
- Free covers 100 synced context files; Pro is 15 a month billed yearly with unlimited files. Per-seat pricing for teams is not published; Enterprise adds SSO, RBAC and on-premises deployment by quote.
- Is ByteRover safe for company data?
- Memory is written to your machine and synced to ByteRover's cloud for team spaces; the pricing page lists SOC 2 only under Enterprise, while Hermes's docs describe the cloud sync as SOC 2 Type II. Retention and training-use terms are not published on the pricing page.
- What are the best ByteRover alternatives?
- The closest alternatives we have reviewed are Zep, Supermemory and RetainDB.
Answers checked Nov 6, 2026.