Same problem.
Opposite direction.
Momentic moves testing into its own platform, with its own editor, agents, and dashboard. Beryl goes the other way. Tests are authored from a document in your repo and maintained through the AI coding assistant you already use, every test replays the same way each time, and your workflow stays where it is. If you ship from Claude Code or Cursor, that decides it.
Momentic moves testing into its own platform. Beryl goes the other way. Tests are authored from a document in your repo and maintained through the AI coding assistant you already use, and your workflow stays where it is.
Where they differ
| Beryl | Momentic | |
|---|---|---|
| What it is | A plug-in and CLI for the AI coding assistant you already use. You write a document, Beryl's cloud agent writes the tests, Beryl runs and repairs them | A hosted AI testing platform with its own editor, agents, and dashboard |
| Where tests come from | A document in your repo: your coding assistant kicks off the job and Beryl's cloud agent authors one test per flow it describes | In Momentic's editor or by its agents, outside your coding workflow |
| What a test looks like | The steps, what the test is for, and what it must prove, in natural language | Plain-English steps stored as YAML |
| AI while tests run | None. Tests replay as plain Playwright, the same steps every time | AI re-interprets the steps on each run, so a test is not a fixed replay |
| OTP, 2FA & login links | Built in. Each project has its own inbox, so OTP, two-factor, and magic-link flows just work; password credentials supported too | Inboxes exist, but reading a code or following a link takes JavaScript steps you write |
| Setup & cleanup | Before and after steps per test. After steps run on pass and fail, so a test always cleans up | Cleanup is ordinary steps, skipped when a test fails midway |
| When the UI changes | Cosmetic drift and flaky tests repair themselves; real breaks stay red | Auto-heal and maintenance agents update tests as the product changes |
| Your coding agent in the loop | Every command is an MCP tool: your agent creates tests from a document, triggers cloud runs, reads failures, and ships fixes proved by a replay | A CLI triggers runs from laptops and CI, but authoring and fixes live in Momentic's editor and agents |
| Leaving | Export any time. Standard Playwright files that run anywhere | YAML lives in your repo but runs only on Momentic |
Momentic capabilities summarized from momentic.ai as of August 2026. Verify current capabilities with the vendor.
Why teams pick Beryl
- Tests start as plain English. Describe the flows in a document and Beryl's cloud agent authors a test for each one
- Runs happen in real Chrome in Beryl's cloud, triggered from your agent, a schedule, or CI
- Logins, email codes, and login links are handled by a built-in test account and inbox
- Daily or weekly runs per environment, with Slack alerts when something fails
- When the UI drifts, cosmetic breaks are repaired and real breaks are flagged
- Screenshots, traces, and replays for every run, shared with the whole team
- Every test stays a normal Playwright file; export any time
Common questions
What is the main difference between Beryl and Momentic?
Where the work happens. Beryl is a plug-in and CLI for the coding assistant you already use: tests start as a document in your repo, Beryl's cloud agent authors them, and your assistant runs and fixes them without leaving your editor. Momentic is a hosted platform with its own editor, agents, and dashboard.
Does AI run while my tests execute?
Not in Beryl. Tests replay as plain Playwright, the same steps every time, so a run is deterministic. Momentic re-interprets the steps with AI on each run.
How are OTP, two-factor, and magic-link logins handled?
Built in. Each Beryl project has its own inbox, so codes and links are read automatically. In Momentic, inboxes exist, but reading a code or following a link is JavaScript you write.
How do I run and fix tests from my editor?
Through the Beryl MCP and CLI: your coding agent triggers cloud runs, reads the failures, and fixes a test's plain-JSON plan, with every fix proved by a replay before it saves. Momentic's CLI triggers runs too, but authoring and maintenance live in its platform.
What if I want to leave?
Export any time. Beryl tests are standard Playwright files that run anywhere. Momentic's YAML lives in your repo but runs only on Momentic.