AgentAPIvsGitLab Duo
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
AgentAPI
Coder · Agent harness
OSS
Panel
7.33 spec wins
- Reliability
- 7.2
- Usefulness
- 6.7
- Cost
- 8.5
- Longevity
- 6.8
“Its web platform is a chat page served to your own laptop on port 3284, which makes it the most honest cloud on this board.”
GitLab Duo
GitLab · Agent harness
MCP
Panel
6.86 spec wins
- Reliability
- 6.7
- Usefulness
- 6.5
- Cost
- 5.8
- Longevity
- 8.0
“It has shipped a Security Analyst agent, so the robot now files the vulnerability the other robot wrote.”
Spec by spec
| Spec | AgentAPI | GitLab Duo |
|---|---|---|
| Architecture | ||
| Category | Agent harness | Agent harness |
| Runs | local | local, cloud |
| Platforms | macos, linux, windows, web | macos, linux, windows, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | Yes |
| MCP server | No | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | Yes |
| Multi-file edits | NoEditing is done by the wrapped agent; AgentAPI only relays messages to and from it. | Yes |
| Git operations | No | Yes |
| Browser control | No | No |
| Sandboxed execution | No | No |
| Multi-agent orchestration | No | Yes |
| Headless / CI mode | Yes | YesFlows started from the GitLab UI execute in GitLab CI/CD runners. |
| Models | ||
| Backbone | via wrapped agents (Claude Code, Goose, Aider, Gemini CLI, Amp, Codex) | Anthropic Claude |
| Bring your own model | Yes | YesOnly through the GitLab Duo Self-Hosted deployment on Self-Managed instances. |
| Local models | No | YesGitLab Self-Managed instances can run Duo against self-hosted models through a self-installed AI Gateway; GitLab.com uses GitLab-selected models. |
| Cost | ||
| Pricing model | free | seat |
| Starts at | $0/mo | n/a |
| Free tier | Yes | No |
| Bring your own key | Yes | No |
| Openness | ||
| Open source | Yes | No |
| License | MIT | proprietary |
| GitHub stars | 1,500 | n/a |
Which one would each critic pick
| Critic | AgentAPI | GitLab Duo | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.5 | 7.0 | AgentAPI — Pick it when a script or a web page needs to talk to an agent you already trust in a terminal; pick the Claude Agent SDK if you only ever wrap one. |
| El Crítico | 6.5 | 6.5 | no preference |
| El Profesor | 7.0 | 7.0 | no preference |
| La Inversora | 7.3 | 8.0 | GitLab Duo — Bundling the entry tier into Premium and Ultimate is an attach-rate play, not a product launch: the AI is defending the subscription, not selling itself. |
| La Jefa | 7.0 | 7.3 | GitLab Duo — The add-on seats are quoted rather than listed, and Agent Platform usage draws down purchased Credits, so sixty developers is one number I cannot compute in advance. |
| El Hacker | 8.5 | 4.8 | AgentAPI — MIT, one downloaded binary, `agentapi server -- claude`, and their answer on MCP is a README section showing you how to build that server yourself. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.