Momentic

Last tested: 2026-11-05

Momentic is aI QA platform from a YC W24 team. Its new agent, Mo, takes a prompt, explores your web app (a URL or a tunnelled local app) or an uploaded iOS or Android build, and reports bugs with reproduction steps and recordings. It also has agentic tests kept as YAML in your repo, a CLI for local and CI runs, and an MCP server so your coding agent can write, run and debug tests (category: Testing & Debugging). VibeToolRank agent test score: 9.6/10 (tested 2026-11-05, 3 runs, cloud free plan), #1 of 2 tested Testing & Debugging tools. Pricing: Free: $0/month with $50 of included usage each month (test steps, hosted runtime, AI features, and Mo share one balance; no overages, runs pause at $0), all core features and AI test authoring, 30-day results retention, no credit card. Scale: $500/month with $500 included usage, add funds from $50, 5 Android + 5 iOS devices, SMS/OTP numbers, shared Slack. Enterprise: custom test-based pricing with SAML/SCIM/audit log. Free tier: Yes: Free plan with $50 of usage each month, no credit card required (official pricing page, verified 2026-11-05).

Key facts

Verdict: 2026-11-06 supplemental: Mo caught a seeded local-shop pricing bug (line total = price×qty+1) in 3/3 `qa start --effort low` tunnel sessions (~$0.40–$1.15 each, ~$2.65 total); published Overall unchanged.

VibeToolRank score: 9.6/10
Rank: #1 of 2 tested Testing & Debugging
Category: Testing & Debugging
Last tested: 2026-11-05
Runs: 3 runs
Outcome score: 10/10
Edition tested: Momentic Free ($50/mo usage). Mo via qa CLI 0.32.0 --effort low; YAML via momentic CLI 3.70.0 local Chromium. Not Scale/Enterprise, not mobile. Published score = 2026-11-05 happy-path; 2026-11-06 seeded bug-finding is supplemental.
Free plan, as measured: ~$0.30 Mo happy-path + ~$0.23 estimated YAML steps + ~$2.65 Mo bug-finding (~$3.18 Mo+YAML est) of $50 Free monthly allocation
Free plan: Yes: Free plan with $50 of usage each month, no credit card required (official pricing page, verified 2026-11-05)
Price: Free: $0/month with $50 of included usage each month (test steps, hosted runtime, AI features, and Mo share one balance; no overages, runs pause at $0), all core features and AI test authoring, 30-day results retention, no credit card. Scale: $500/month with $500 included usage, add funds from $50, 5 Android + 5 iOS devices, SMS/OTP numbers, shared Slack. Enterprise: custom test-based pricing with SAML/SCIM/audit log
Pricing checked: 2026-11-06
Sources: momentic.ai/pricing · momentic.ai · momentic.ai/mo · test log in our repo

Visit Momentic

Pricing and free tier

Current official pricing (checked 2026-11-06): Free: $0/month with $50 of included usage each month (test steps, hosted runtime, AI features, and Mo share one balance; no overages, runs pause at $0), all core features and AI test authoring, 30-day results retention, no credit card. Scale: $500/month with $500 included usage, add funds from $50, 5 Android + 5 iOS devices, SMS/OTP numbers, shared Slack. Enterprise: custom test-based pricing with SAML/SCIM/audit log

Is Momentic free? Yes: Free plan with $50 of usage each month, no credit card required (official pricing page, verified 2026-11-05)

Free includes $50 of usage per calendar month (no rollover). Test step $0.0125; AI-generated/recovery step $0.025; hosted browser $0.005/min; Mo billed at cost from the same balance. Runs pause at $0. Resets monthly (this workspace: 2026-12-05).

verified-official official source · full-page-read. Official plan limits can change; re-check the vendor page before paying. Figures from our tests are recorded observations, not a current-capacity promise.

What we measured in our test (2026-11-05, 3 runs): ~$0.30 Mo happy-path + ~$0.23 estimated YAML steps + ~$2.65 Mo bug-finding (~$3.18 Mo+YAML est) of $50 Free monthly allocation Momentic free tier: how far you get

Agent test verdict

Edition tested Momentic Free ($50/mo usage). Mo via qa CLI 0.32.0 --effort low; YAML via momentic CLI 3.70.0 local Chromium. Not Scale/Enterprise, not mobile. Published score = 2026-11-05 happy-path; 2026-11-06 seeded bug-finding is supplemental.. Results may differ for the hosted product.

Tested 2026-11-05 · 3 runs · rubric v0.1 (provisional thresholds). Adapted QA task (not T3): Mo verified login + add-to-cart on Momentic's public wizard demo shop in 3/3 sessions (~60–95s, ~$0.08–$0.12 each). Wizard YAML add-to-cart also 3/3. Overall 9.6 (happy-path edition). 2026-11-06 supplemental: Mo caught a seeded local-shop pricing bug (line total = price×qty+1) in 3/3 `qa start --effort low` tunnel sessions (~$0.40–$1.15 each, ~$2.65 total); published Overall unchanged.

Dimension	Score /10
Outcome (40%)	10
Speed (15%)	10
Cost (15%)	10
Developer experience (15%)	7
Reliability (15%)	10
Overall	9.6

How we tested

Signed in Free workspace VibeToolRank ([email protected]) with MOMENTIC_API_KEY.
Primary (2026-11-05): qa start --effort low against https://static.momentic.ai/wizard/index.html — login, add Momentic Backpack, verify cart, no checkout. 3 identical briefs.
Secondary (2026-11-05): @momentic/wizard noninteractive sample + momentic run web/add-to-cart.test.yaml --upload-results ×3 on local Chromium.
Supplemental (2026-11-06): seeded static shop on 127.0.0.1:9876 (lineTotal = price×qty+1), qa tunnel vtr-seed-shop, qa start --effort low ×3; Mo caught seeded bug 3/3. Evidence under docs/tests/momentic/mo-bug{1,2,3}/ and BUG-SEED.md.
Recorded qa cost / status / wait / bugs list JSON and session URLs. Happy-path Mo ~$0.30; bug-finding Mo ~$2.65.

Pros, cons and who it's for

Pros

Mo completed the cart brief correctly in 3/3 headless CLI sessions
Fast on a narrow brief: ~1–1.5 minutes per session at --effort low
Cheap on Free: ~$0.30 Mo for three happy-path sessions; YAML local runs also inexpensive
Noninteractive wizard scaffolds a working YAML sample and uploads results
No credit card on Free; usage pauses at $0 instead of overage bills
2026-11-06: Mo caught a seeded +$1/line cart bug in 3/3 tunnelled local-shop sessions with correct expected/actual

Cons

Needs a Momentic account and API key before CLI/Mo work
npm package for Mo is qa (npx mo is a different project) — easy to miss
Published Overall 9.6 is the happy-path cart edition; bug-finding is supplemental evidence, not a blended rescore
Mo does not write Momentic YAML test files; YAML authoring is a separate path
Free $50/mo is shared across steps, hosted browsers, AI features, and Mo — a max-effort Mo session can burn a large slice
Tunneling is alpha; local port conflicts (wrong process on 8765) required a URL correction mid-session once

Who it's for: Vibe coders and small teams who ship fast with coding agents and want an AI agent to bug-bash their web or mobile app before deploy, without hand-writing Playwright scripts.

Free-tier limits: Free includes $50 of usage per calendar month (no rollover). Test step $0.0125; AI-generated/recovery step $0.025; hosted browser $0.005/min; Mo billed at cost from the same balance. Runs pause at $0. Resets monthly (this workspace: 2026-12-05).

FAQ

Is Momentic free?

Yes: Free plan with $50 of usage each month, no credit card required (official pricing page, verified 2026-11-05). In our test: ~$0.30 Mo happy-path + ~$0.23 estimated YAML steps + ~$2.65 Mo bug-finding (~$3.18 Mo+YAML est) of $50 Free monthly allocation.

How did Momentic score in VibeToolRank's test?

9.6/10 overall (outcome 10, speed 10, cost 10, developer experience 7, reliability 10), 3 runs on 2026-11-05. 2026-11-06 supplemental: Mo caught a seeded local-shop pricing bug (line total = price×qty+1) in 3/3 `qa start --effort low` tunnel sessions (~$0.40–$1.15 each, ~$2.65 total); published Overall unchanged.

How much does Momentic cost?

Free: $0/month with $50 of included usage each month (test steps, hosted runtime, AI features, and Mo share one balance; no overages, runs pause at $0), all core features and AI test authoring, 30-day results retention, no credit card. Scale: $500/month with $500 included usage, add funds from $50, 5 Android + 5 iOS devices, SMS/OTP numbers, shared Slack. Enterprise: custom test-based pricing with SAML/SCIM/audit log (from the official pricing page, checked 2026-11-06).

Comparisons

Momentic vs Sentry

Other Testing & Debugging

Sentry — 9.3/10

Best Testing & Debugging · Best free Testing & Debugging · All tools · How we test

Sources

Scores come from our own tests and are never for sale; sponsored placements are always labelled. Some links are affiliate links (currently Railway). Disclosure