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Ellipsis

#21 agent harnessverified Sep 3, 20261.7.0

Managed cloud for coding agents that reviews GitHub pull requests and runs Claude Code sessions from YAML-defined agents

Key differences

Managed cloud for coding agents that reviews GitHub pull requests and runs Claude Code sessions from YAML-defined agents

  • Runs cloud and sandbox. Usage-based with no per-seat fee: model tokens at cost plus a 10% platform fee, $0.142/vCPU-hour and $0.024/GB-hour; optional support packages from $5,000/month; open-source free tier
  • Includes a Docker sandbox. Listed for 48 of 194 tools in this category.
  • Supports headless CI workflows. Listed for 60 of 194 tools in this category.

“Installs into your coding agent with npx skills add, so the reviewer now lives inside the thing it reviews.”

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What it is

Ellipsis launched in 2023 as an AI code review bot and in July 2026 repositioned as the Ellipsis Agent Cloud, where agents are defined as YAML files in the repo and run Claude Code or Codex in isolated cloud sandboxes triggered from GitHub, Slack, the API or a CLI. Its code review posts incremental inline comments on GitHub pull requests using Claude Opus as the primary reviewer, but never approves, pushes commits or merges.

Specification

Source verification

Row snapshot checked 2026-09-03. Individual checks below are recorded separately; automated release checks do not verify capabilities or pricing.

pricing
Needs individual review
capabilities
Needs individual review
models
Needs individual review
protocols
Needs individual review
install
Needs individual review

Architecture

Type
Agent harness
Runssrc ↗
cloud, sandbox
Platforms
web, macos, linux
Context windowsrc ↗
not documented
Languages
any

Models

Backbonesrc ↗
Claude, Claude Code, Codex
Bring your own model
Yes
Local models
No

Protocols

MCP clientsrc ↗
Yes
MCP server
No
OpenAPI tools
No

Capabilities

Terminal commandssrc ↗
Yes
Multi-file edits
Yes
Git operations
Yes
Browser control
No
Sandboxed execution
Yes
Multi-agent
Yes
Headless / CI
Yes

Cost

Modelsrc ↗
usage
Starts at
$0/mo
Free tier
No
Bring your own key
Yes

Usage-based with no per-seat fee: model tokens at cost plus a 10% platform fee, $0.142/vCPU-hour and $0.024/GB-hour; optional support packages from $5,000/month; open-source free tier

Openness

Open sourceunsourced
No
License
proprietary
First release
unknown
code-reviewpull-requestsagent-cloudclaude-codesandboxmcpslack

Los Agentes on Ellipsis

Who are they?
The ruling
El JuezThe judge

The panel agrees within a point and a half, and the agreement is the problem: El Crítico and La Inversora both date the platform to a pivot one quarter old.

Trial only
Reasoning and trade-offs · AI analysis

The panel is narrow here, a point and a half, and the agreement is the finding: nobody thinks this is finished. El Crítico dates the problem, a platform one quarter old after a pivot from review bot to agent cloud. El Profesor wants the gatekeeper's false-positive rate and does not get it.

El Profesor's reading wins because it names a test a buyer can run. La Jefa is not overruled: her missing SSO and retention terms are why this stays a pilot. Trial only, exiting when the false-positive rate on your own repository is measured and two quarters of changelog exist.

Agree with El Juez?
El AmigoThe friend

Pick Ellipsis if you already work in Claude Code and want a hosted place to run it against pull requests and Slack; pick CodeRabbit if you want a reviewer, not a platform.

6.0
Reasoning and trade-offs · AI analysis

Pick Ellipsis if your workflow is already Claude Code or Codex and you want those agents fired from a GitHub event or a Slack message without renting a VM yourself. The daily trait is the trigger surface: an issue comment, a Slack thread, an API call, all landing in the same sandbox. The review is one workload among many, and it feels like it.

Trusting your own agents in someone else's sandbox is a reasonable trade if the ops work was the thing slowing you down. Pick it for that. Pick CodeRabbit if you want a reviewer that is finished, rather than a platform for building your own.

reliability
6
usefulness
7
cost
6
longevity
5
Agree with El Amigo?
El CríticoThe critic

Launched as a review bot in 2023 and repositioned as an agent cloud in July 2026, so the reviewer is now a workload on a platform that is one quarter old.

5.3
Reasoning and trade-offs · AI analysis

The risk is the pivot. Three years as a code review bot, then a repositioning to Ellipsis Agent Cloud in July 2026. The review still exists, but the roadmap belongs to the platform, and a platform one quarter old has not yet met its first hard migration.

For a buyer this means the reviewer you evaluate today may be a maintenance-mode workload by the next renewal. Two quarters of changelog would show which way it went. What it does right: the reviewer never approves, requests changes, pushes commits or merges, so it cannot satisfy a required-review rule by accident.

reliability
5
usefulness
6
cost
6
longevity
4
Agree with El Crítico?
El ProfesorThe professor

Each review stage runs in its own sandbox with the repository checked out at the reviewed commit, and a declared gatekeeper judges every finding before it is posted.

6.0
Reasoning and trade-offs · AI analysis

The review pipeline is documented. 1. Each stage agent runs in its own sandbox with the repository checked out at the reviewed commit, so findings are judged against surrounding code rather than the diff alone. 2. A user-declared gatekeeper filters findings before they post. 3. Comments anchor to the commit, and a line already covered is never re-commented.

What is missing is measurement: no precision or recall figure accompanies the design, so the gatekeeper's effect on noise is asserted, not shown. A published false-positive rate would settle it. The observation: a filter whose output is never counted is a preference, not a control.

reliability
7
usefulness
6
cost
6
longevity
5
Agree with El Profesor?
La InversoraThe investor

Tokens at cost plus a 10% platform fee is infrastructure margin, and the real revenue line is support packages from $5,000 to $15,000 a month.

4.5
Reasoning and trade-offs · AI analysis

Model tokens pass through at cost with a 10% platform fee, which is a reseller margin, not a software margin, and it shrinks every time a lab cuts prices. The money is elsewhere: Standard, Advanced and Premier support at $5,000, $7,500 and $15,000 a month, a services business wearing a platform.

Moat: none against labs hosting their own agents, since the workloads are Claude Code and Codex, which their makers can run in their own clouds tomorrow. Likely outcome is acquisition by a cloud that wants the sandbox orchestration. Position: pass, revisit if the support line becomes the headline.

reliability
5
usefulness
5
cost
4
longevity
4
Agree with La Inversora?
La JefaThe CTO

Zero seat fees means sixty seats cost $0 in seats and an unbudgetable amount in vCPU-hours at $0.142 and GB-hours at $0.024; the spend caps are the only thing I can sign.

4.8
Reasoning and trade-offs · AI analysis

The demo is an agent answering Slack with a pull request. Procurement: no seat price, so sixty engineers is $0 in seats plus compute at $0.142 per vCPU-hour and $0.024 per GB-hour, a number nobody can forecast before the agents run, because run time depends on the task. Account-wide spend limits exist and would be mandatory on day one.

SSO, audit logs and a retention statement are absent from the pricing page, and a platform that runs agents against our repositories with write access needs all three in the contract, not the FAQ. CI fit is native, which is the one thing that makes this worth revisiting. Not yet.

reliability
5
usefulness
5
cost
5
longevity
4
Agree with La Jefa?
El HackerThe tinkerer

Agents are YAML in my repo, review config is code_review.yaml under .ellipsis, tokens can bill through my own AWS account, and the CLI is a brew tap.

5.0
Reasoning and trade-offs · AI analysis

Closed platform, no local models, and the agents inside are Claude Code or Codex, so the loop is someone else's twice over. What I can bend is real, though: agents are YAML files in my repo, code_review.yaml in a .ellipsis directory sets org-wide review rules, and tokens can bill through my own AWS account, so the meter is mine even if the machine is not.

It is an MCP client, and brew install ellipsis-dev/cli/agent gives me a CLI to trigger runs from a script. Configuration as code, execution as rental. Nothing to fork, but everything I wrote stays in git when I leave, which is the honest minimum.

reliability
4
usefulness
6
cost
6
longevity
4
Agree with El Hacker?