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Aider vs Ellipsis: How They Actually Differ

Aider fits a builder who wants a free, open-source terminal agent that brings their own model keys and commits every accepted change to git. Ellipsis fits a team that lives in GitHub and wants automatic PR reviews plus in-PR fix commits. They solve different problems; pick by workflow.

Compiled 2026-08-31 from our catalogue entries for Aider and Ellipsis.

The short answer

Pick Aider if
you write code in the terminal, want a free and Apache-2.0-licensed agent, and are happy bringing your own API keys (or a local Ollama model) so every accepted change lands as a git commit with a generated message.
Pick Ellipsis if
your team works in GitHub and wants a GitHub App that automatically reviews pull requests for style, bugs, and architecture, and that can also generate and commit fix code directly to the PR.
Cheapest way in
Aider is free (open source, bring-your-own-key). Ellipsis' Managed SaaS plan is listed at $0 base plus usage: tokens at cost, $0.142 / vCPU-hour, $0.024 / GB-hour, plus a 20% platform fee. Premium Ellipsis support tiers ($5,000, $7,500, $15,000 / month) are separate from Aider's free model.
What we could not compare
Aider has no listed support plans, IDE integration, or GUI; Ellipsis has no listed IDE extension or CLI. Specific accuracy, latency, and coverage claims are not on the fact sheet.

Aider is an open-source CLI agent that pair-programs in the terminal and commits each accepted change to git with a generated message. It is licensed under Apache 2.0, supports bring-your-own-key across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama, and runs on macOS, Windows, and Linux. There is no GUI or inline-edit overlay.

Ellipsis is an AI agent that runs as a GitHub App and reviews every pull request for style, bugs, and architecture. It can also generate and commit code fixes directly to the PR and produce PR descriptions from code diffs. Pricing is paid, starting at a Managed SaaS plan with a $0 base plus usage-based fees, and it works only on the web inside GitHub.

Side by side

Every cell is a field on our catalogue entry for that tool, copied as recorded. Rows where the two differ come first; blank fields say so rather than being filled in.

 AiderEllipsis
Pricing modelFreePaid
Starts atFreeManaged SaaS — $0 base + usage (tokens at cost, $0.142 / vCPU-hour, $0.024 / GB-hour, 20% platform fee)
Runs onmac, win, linux, cliweb
Public source codeYes — public repoNo public repo listed
CategoryAI Coding AgentsAI Coding Agents
Public docsNot listedNot listed
  • Public source code: From the repository link on each catalogue entry, not a licence audit.

Where Aider is the better fit

  • Fully open source under Apache 2.0 with no vendor lock-in.
  • Bring-your-own-key for OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.
  • Every accepted change is committed to git with a generated message.
  • Cross-platform terminal tool on mac, win, and linux.

Full Aider entry

Where Ellipsis is the better fit

  • Functions as a GitHub App that automatically reviews pull requests.
  • Can generate and commit code fixes directly to a pull request in response to review feedback.
  • Reviews cover code style, potential bugs, and architectural concerns.
  • Can produce pull request descriptions generated from code diffs.

Full Ellipsis entry · Ellipsis pricing, verified

Which one should you pick?

Solo founder who lives in the terminal
Aider

It is free, open source, model-agnostic via bring-your-own-key, and ties every accepted change to a git commit.

Small team on GitHub wanting automated PR review
Ellipsis

It reviews PRs and can commit fix code directly to the pull request, all from within the GitHub interface.

Team using GitLab, Bitbucket, or another Git host
Neither

Ellipsis lists GitHub-only support with no integration for GitLab, Bitbucket, or other Git platforms.

Frequently asked questions

Does Aider have a GUI or IDE plugin?
No. The fact sheet says it is command-line only with no inline-edit overlay like Cursor.
Does Ellipsis support GitLab or Bitbucket?
No. The sheet says it supports only GitHub, with no integration for GitLab, Bitbucket, or other Git platforms.
What does Ellipsis cost at minimum?
The verified Managed SaaS plan is $0 base plus usage: tokens at cost, $0.142 / vCPU-hour, $0.024 / GB-hour, plus a 20% platform fee.
Can Aider run local models?
Yes. The fact sheet lists local Ollama models as one of the bring-your-own-key options.
Can Ellipsis commit code, or only comment?
It can do both. The sheet says it can generate and commit code fixes directly to a pull request in response to review feedback.
Is Aider's repo public?
Yes. The fact sheet lists https://github.com/Aider-AI/aider. Ellipsis has no public repo listed.

What we compared

This page states nothing that is not in the two catalogue entries below. The exact text used to write it is reproduced here so you can check our reading, and both tools link through to their own pages and to the vendor.

Show the source text
## Aider (/tools/aider)
Tagline: Open-source CLI coding agent that pair-programs in your terminal and commits to git automatically.
Category: AI Coding Agents
Pricing model: free
Starts at: Free
Platforms: mac, win, linux, cli
Public repo: https://github.com/Aider-AI/aider
Docs: none listed
Verified plans: none on file
Strengths on file: Fully open source under Apache 2.0; no vendor lock-in.; Bring-your-own-key for OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models.; Every accepted change is committed to git with a generated message.
Limits on file: No GUI — command-line only; no inline-edit overlay like Cursor.; Cost depends entirely on the underlying provider's token pricing.
Aider is an open-source CLI coding agent that pair-programs in your terminal and commits each change to git automatically.
Its edge is openness and git discipline: Apache-2.0 with no lock-in, bring-your-own-key across OpenAI, Anthropic, Gemini, DeepSeek, and local Ollama models, and every accepted change landing as a git commit with a generated message.
It fits developers who live in the terminal and want a model-agnostic agent tied to version control. The trade-offs: there's no GUI or inline-edit overlay like Cursor's — it's command-line only — and cost tracks whatever provider's token pricing you bring.
It's the open, BYOK terminal agent next to Anthropic's Claude Code and IDE-native Cursor.

## Ellipsis (/tools/ellipsis)
Tagline: AI agent that reviews every PR — comments on style, bugs, and architecture inside GitHub.
Category: AI Coding Agents
Pricing model: paid
Starts at: Managed SaaS — $0 base + usage (tokens at cost, $0.142 / vCPU-hour, $0.024 / GB-hour, 20% platform fee)
Platforms: web
Public repo: none listed
Docs: none listed
Verified plans (read 2026-08-22): Managed SaaS $0 base + usage (tokens at cost, $0.142 / vCPU-hour, $0.024 / GB-hour, 20% platform fee) | Your AWS Account $0 base + usage + AWS costs (20% platform fee; CPU, memory, and tokens billed by AWS) | Standard support $5,000 / month | Advanced support $7,500 / month | Premier support $15,000 / month
Strengths on file: Functions as a GitHub App that automatically reviews pull requests.; Can generate and commit code fixes directly to a pull request in response to review feedback.; Reviews cover code style, potential bugs, and architectural concerns.; Can produce pull request descriptions generated from code diffs.
Limits on file: Supports only GitHub, with no integration for GitLab, Bitbucket, or other Git platforms.; Free tier imposes usage limits consistent with its freemium pricing.
Ellipsis is an AI code-review agent that reviews every pull request inside GitHub. It runs as a GitHub App that reviews pull requests automatically.
Its reviews cover code style, potential bugs, and architectural concerns, and it can go further than commenting: it can generate and commit code fixes directly to a pull request in response to feedback, and produce pull request descriptions from code diffs.
It fits teams that work in GitHub and want automated PR review and fixes. Caveats: it supports only GitHub, with no integration for GitLab, Bitbucket, or other Git platforms; there is no IDE extension or CLI, so interaction is limited to the GitHub web interface; and the free tier imposes usage limits.
Among code-review tools, it is a GitHub-native agent that both comments and commits fixes rather than a standalone editor or CLI reviewer.

Change log

  • 2026-08-31 First published, compiled from the catalogue entries for Aider and Ellipsis.