BitFunvsKelos
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
BitFun
GCWing · Agent harness
OSSMCP
Panel
6.82 spec wins
- Reliability
- 6.2
- Usefulness
- 7.2
- Cost
- 8.0
- Longevity
- 5.7
“Customising it has four tiers, which is three more tiers than most people reach before they go back to the defaults.”
Kelos
Kelos · Agent harness
OSSMCP
Panel
6.82 spec wins
- Reliability
- 7.0
- Usefulness
- 7.0
- Cost
- 7.0
- Longevity
- 6.2
“Agents can be spawned from a cron entry, so your codebase now changes on a schedule whether or not anybody asked.”
Spec by spec
| Spec | BitFun | Kelos |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | cloud, sandbox |
| Platforms | macos, linux, windows | macos, linux, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | Yes | Yes |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | Yes | Yes |
| Git operations | Yes | Yes |
| Browser control | Yes | No |
| Sandboxed execution | No | YesEvery agent runs in an isolated Kubernetes Pod or Job rather than on a developer laptop. |
| Multi-agent orchestration | YesCustom agents are the first of BitFun's four customisation tiers. | Yes |
| Headless / CI mode | No | Yes |
| Models | ||
| Backbone | any | via managed agents (Claude Code, Codex, Gemini, OpenCode, Cursor, custom agent images) |
| Bring your own model | YesBitFun is described as model-agnostic: you pick a provider, enter its API key and choose models at first run. | Yes |
| Local models | No | No |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | $0/mo | $0/mo |
| Free tier | Yes | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | MIT | Apache-2.0 |
| GitHub stars | 2,370 | 335 |
Which one would each critic pick
| Critic | BitFun | Kelos | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.3 | 6.8 | BitFun — Pick it if you think in dashboards rather than transcripts; pick a terminal agent if a scrolling log is genuinely how you like to work. |
| El Crítico | 6.5 | 6.0 | BitFun — It drives the browser, the terminal, desktop applications, the filesystem and remote workspaces, and the row records no sandbox around any of it. |
| El Profesor | 6.8 | 7.3 | Kelos — Task status records the branches, commits, pull requests and token usage a run produced, which turns the outcome of an agent into a queryable field rather than a screenshot. |
| La Inversora | 6.5 | 6.3 | BitFun — 2,047 stars, a personal namespace and no price anywhere: distribution is real, the business is not, and the two rarely stay apart for long. |
| La Jefa | 6.0 | 6.8 | Kelos — Identity, roles and audit come from the cluster I already operate, which is the first time this quarter a tool answered the security questionnaire by not existing separately. |
| El Hacker | 7.5 | 7.8 | Kelos — Apache-2.0, an AgentConfig that carries my instructions, skills, plugins and MCP servers into every run, and a custom agent image when the supported ones are not what I want. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.