Ship fast.
Don't break things.
Lastest is a visual regression testing tool for teams that ship fast with AI. Record your tests or have AI do it, get them organized, CI runs them - and every release diffs before against after so only the things you intended to change actually change.
No credit card required
30s
Full suite. A sprint of testing, every commit.
3 engines
Pixel · Structural · Perceptual diffs
0 regressions
Reach prod. Visual diffs block merges automatically.
Plugs into
The workflow
Record. Test. Ship.
Three steps between you and a UI that never regresses. No test code to write.
REC
1
Record
Click through your app once in the browser. Lastest captures the flow and every screen along the way. No selectors, no scripts.
1.4s
2.1s
+2.1%
1.8s
23/24
2
Test
On every push, Lastest replays the flow in real Chromium, Firefox and WebKit, and diffs every screen against your approved baseline.
All checks passed
Merge pull request
3
Ship
Approve intended changes as the new baseline, and merge with confidence. What you saw is exactly what your users get.
The record page
Just use your app.
Lastest writes the test.
Open the embedded browser and click through a flow. Every action you (or an AI agent) take is copied step by step, its selector is captured, and it lands in the timeline as it happens. When you stop, that timeline becomes the baseline every future run is compared against.
- Mirrors real clicks, types and selects, from a human or an agent.
- Captures a resilient selector for every step, so it survives refactors.
- Builds the timeline that becomes your comparison baseline.
Timeline
Interact with
the page to
capture steps
the page to
capture steps
Full-flow coverage
Every screen in the flow, watched.
Lastest doesn't stop at the page you edited - it walks the whole recorded flow, home to checkout, and flags exactly which screens moved. A two-pixel shift on checkout surfaces here before a reviewer ever has to go looking for it.
User flow · storefront2 changed
Home /
Product
Cart
+2.1%
Checkout2 diffs
Confirmed
Beyond pixels
Not just a picture.
The whole snapshot.
Lastest diffs twelve layers of every screen, not only the image. When a change appears, the agent traces it to the real cause: a shifted DOM node, a new network call, a design-token regression, a slower paint. That is how the development loop closes on the underlying issue, not just the symptom.
CHANGED
1.05%
1.05% pixels changed2 snapshotsDraw FocusDraw Ignore
Baseline and current are pixel-matched automatically — switch modes to review the way that makes the change clearest to you.
Close the loop
From diff to fix,
without you.
Because Lastest captures the whole snapshot and not just a picture, it files a GitHub issue with everything a fix needs: the changed layers, the failing selector, the network delta and the suspected cause. It assigns your AI engineer, who reads that context, opens a PR, and closes the issue. You review the result, not the investigation.
- Issues arrive pre-loaded with the snapshot's full evidence trail.
- Your AI engineer picks it up, opens a PR and re-runs the check.
- The issue closes itself once the re-run comes back safe_to_merge.
open#247
Visual regression · price stepper shifted 9px in checkout
Auto-filed from snapshot #248 · full context attached
+1.05%
AssigneeUnassigned
drafting issue from snapshot…
CI-native
Caught in CI,
not in production.
Lastest runs as a required status check on every pull request - against the Vercel or Netlify preview of that exact commit, so what gets tested is what ships. When a screen shifts, the merge is blocked and the diff is one click away, so reviewers see exactly what moved, right inside the PR.
1m 42s
avg. full run
0
flaky reruns
3
real browsers
fix(checkout): align price stepper#482Open
build · passed in 46s
unit tests · 312 passed
Lastest / visual · 2 changes detectedRequired
deploy preview · pending
Why it matters
Ship faster because
you trust every deploy.
Manual UI checks are slow and easy to skip, so regressions slip out and cost you a support ticket, a hotfix, and a customer's trust. Lastest turns that whole loop into a green check: you move quickly precisely because you can see nothing broke.
Catch regressions in seconds, not tickets
A shifted layout shows up on the pull request, long before a user ever reaches it.
Retire the manual QA pass
The flow you recorded is your regression suite. It reruns itself on every commit, for free.
Merge without the pit in your stomach
A green Lastest check means the UI is exactly as intended. Reviewers approve what they can see moved, nothing more.
This week on mainsafe_to_merge
41
PRs shipped
6
regressions caught
0
reached users
feat: new nav layout
fix: checkout price stepper caught +2.1%
chore: bump dependencies
Platform capabilities
Intelligence
AI test generation
Claude writes resilient Playwright code with a 7-layer selector fallback (data-testid → id → role → aria-label → text → CSS → OCR). Survives refactors that break hand-written tests.
Economics
Zero-token replays
AI runs only when you create or fix a test. Every replay is pure Playwright execution. Test a thousand times a day for €0 in tokens. Self-hosted screenshots are unlimited regardless of volume.
Precision
3 diff engines
pixelmatch (pixel-perfect), SSIM (structural similarity), and Butteraugli (human-perception-aligned). Choose the trade-off per test - or run all three for a benchmark verdict.
Automation
Play Agent - 11-step pipeline
Specialized sub-agents (Orchestrator, Planner, Scout, Diver, Generator, Healer) plan, generate, run, and fix tests autonomously. Pause, approve, or skip any step. Resumes where it left off.
Ownership
Self-hosted & open source
FSL-1.1-ALv2 license. Your infra, your network boundary. Screenshots never leave your servers. Full source on GitHub. Or run it on Lastest Cloud and skip ops entirely.
Integration
CI/CD native + Smart Run
Reusable GitHub Action, GitLab MR comments (self-hosted GitLab supported), webhook triggers, scheduled cron runs. Smart Run analyzes git diffs and runs only the tests your change touched.
Explore all features
40+ capabilities, four families, every entry on every plan.
What people are saying
Honest words from the community.
Unedited reactions from Reddit threads, users, and early adopters - including the parts where they told us what to fix.
- u/Weird-Shake8670Founder · Lastest caught a real bug
I really appreciate you giving me the heads up on this. My Sentry notification for this just went off 2 hours ago. All fixed. If you find the app useful, here’s a promo as a thank you.
- u/dyagokabar/indiebiz
This sounds like a great alternative to the expensive incumbents. Have you thought about how this could be demoed on TikTok? I have a network of tech-focused accounts and would love to help you collab on a viral video to get this in front of more dev teams.
- u/Quirky_Research_949OP · r/microsaas
Great idea, and I like that it’s open source. That said, I found the design a bit confusing. It took me more than a couple of minutes to understand what the project does. You might want to rethink the design to make the value clearer.
- u/Legitimate-Peace-583r/microsaas
It looks like a great fit for startuplibrary.net! You should submit it for a chance to be featured in our newsletter.
- u/Deep_Ad1959r/webdev · code-review framing
my team runs it exactly this way and the code-review framing is what finally made it stick. when tests generate as plain playwright files instead of runtime LLM orchestration, a UI change produces a diff you can actually look at and decide whether it’s a real breakage or an expected update. nobody has to learn a new DSL either, anyone who knows playwright can read or edit the tests.
- u/Royal_Dream_6246r/softwaretesting · "naked" artifact ask
What I’m looking for is a produced artifact that is truly "naked" - like raw Selenium code or pure Java/Python scripts. If a tool gives me standard code I can just run independently in any IDE without needing a specific vendor’s CLI, that’s the ultimate "no-lock-in" for me.
- u/ctenidae8r/AI_Agents
100%. I try to scope personae so that even ambiguity has some heuristic guidance - make it easier to stay in the valley than hill climb out. Make what you can deterministic, make what’s reasoned easier to get right than wrong.
- u/Elegant-Display-5228r/nextjs · silent SEO failures
That staging noindex example is exactly the kind of failure I was trying to understand. Have you found any off-the-shelf tool that catches this reliably, or is it still mostly custom CI checks with Playwright/Puppeteer?
- u/agentbrowser091r/AI_Agents
This sounds pretty interesting so these checks can help you understand when it is safe to check the page state - so it can make an approach without a screenshot more reliable?
- u/Impossible-Celery-87r/Playwright · SnapDrift OP
Thanks for sharing your real-world setup experience/insights!
- u/adam_clooneyr/sre
Yeah this resonates. the "merged config at apply time" point is exactly where it felt off.
- u/TranslatorRude4917r/Frontend
Exactly, getting team buy-in on conventions is not easy. I think I did not show/explain the difference between e2e and component tests, it seems like a lot of people do a mix of them and just put the e2e stamp on it.
- u/Nice_Translator_9233r/QualityAssurance
Thanks for this perspective. Needed this bit of assurance right now :) I will focus on refining my domain knowledge and API testing skills.
- u/Full_Pirate_5422r/softwaretesting
Makes sense :)
- u/2ERIXr/Playwright
Cheers 🥂
- UserChaitnaya BhagatTested by
Love your app, the vibe is really cool and the name is catchy too. you have too many things going on in your project, so focus your attention functionalities more and you have way too many settings options to choose from 😭
Wed, May 6, 2026 · 06:13 AM - u/Asipahior/AssetBuilders
I like the idea of having one of the agents act on a deterministic outside the model signal. Definitely worth giving it a shot.
- u/Born-Exercise-29322 points · 18h ago
Verification being the bottleneck is exactly right, and it’s not going away because the output surface is growing faster than anyone’s ability to review it. The real unlock isn’t better verification tools, it’s narrowing the scope of what you let AI touch until the failure rate is low enough that spot-checking is sufficient.
- UserPeerPush reviewerTested by
Easy, intuitive, clean and fast. I pressed run but I didn’t get any info on the failed test, so I went to debug mode and there I could visualize the issues. I activated the gamification, so when I ran the test successfully I got a leaderboard with other bot agents, haha! The test itself, running the scripts, the AI fixing the bugs, the info provided during the onboarding - honestly the entire process is well guided and easy to follow through. As of now I made no app as I’m busy coding mine, but it would surely make me confident to try and host an app here. It seems a very professional and legit AI workflow, with a nice code editor and debugger unlike many I know - it’s dev ready, honestly I would recommend it.
- UserGustavooIVPeerPush
Hey, looks really cool tbh. I have been thinking of making something like this myself in the past. Currently don’t have a need for it, but maybe in the future. How is it going for you - how many users does Lastest have? Just curious.
- X / Twitter
@wade_bhavy55123Bhavya Wade · founder whose app Lastest testedReally appreciate you trying it out and sharing feedback 🙌 Glad the no-auth flow felt smooth and worked on the first try. The confidence model was one area I wanted to make more thoughtful than a typical decision matrix.
May 22 - X / Twitter
@Awaki18Lasse · building FixyFlow · Lastest flagged verify emailThanks, will investigate verify email!
May 21 - X / Twitter
@codewithayobamiFolarin Ayobami · aMail founderThanks bro ♥️
Jun 29 - X / Twitter
@buildwithinnoInnocent Dev · InnoStore founderThis cool I will check it out
Jun 26
- u/aviya88Reddit · honest user feedback
Thanks for this. That looks cool. Just a comment as a user - it was not immediately clear what it does. I can see it generated a demo video, but did you do it manually or is it automated by the app? (in that case it’s great.)
- u/ImplementImmediate54r/AI_Agents · BugHunters Vision builder
Looked at lastest, interesting tool. Pre-capture stabilization is a smart approach - freezing noise before it hits the diff engine is clean. Might be worth pointing people toward lastest when they’re starting from scratch, BHV when they’re already invested in an existing suite.
- u/hiten1818726363OP · Top 1% Commenter
Thats just crazy ui bro. And concept is good too. It think you should add some video representation on how it works.
- u/Deep_Ad1959r/webdev · validates the thesis
this is the right split. the approach that’s clicked for me is using AI to crawl the app and generate the initial test files, then running those as plain playwright tests in CI. you get the time savings on the writing side without introducing non-determinism at runtime. the generated code is just standard test files you can read, edit, and debug like anything else.
- u/Royal_Dream_6246r/softwaretesting · vendor-lock-in pain
Yep - that’s exactly what I was trying to find. Feels like there’s still a gap here - either fully in-house or tool-dependent. I haven’t seen a vendor-neutral approach that combines no-code browser automation with visualization and still produces standard, portable automation code.
- u/theov666r/ExperiencedDevs
Well put. The "ADRs as checks instead of docs" framing is close to where my thinking has landed too. Traditional ADRs/documentation help humans review after the fact, but AI-assisted development shifts the bottleneck earlier. If constraints aren’t machine-readable/enforceable before or during generation, review becomes the only control layer and doesn’t scale with output volume.
- u/Equal_Jellyfish_4771r/AI_Agents
The versioned prompt + golden trace replay approach is solid, but the real unlock is treating tool selection itself as a signal. If your agent starts reaching for different tools than usual for the same intent pattern, that’s drift.
- u/Just_Marionberry_673r/Everything_QA · visual regression flakiness
I appreciate your insight. I found out anti-aliasing is also being one of the most difficult things. Can you share your approach using SSIM perceptual diff? Is it something that you build yourself?
- u/zanex13r/Playwright
This guy tests. Great recommendations.
- u/mrothror/ExperiencedDevs
Agree on both of these. I spend a lot of time up front working with it to make the plan. I have definitely had it make sequence diagrams or similar to make sure I understood how it was proposing the components work. Good tip on the tests, that is not something that is part of my regular rotation but probably should be.
- u/tommix1987r/webdev
Yes fully agree on the ci/CD part - it has enormous advantages.
- u/TranslatorRude4917validates PW codegen + anchor tests approach
Create onboarding flow anchor test, set up proper POM, fixtures etc. Using those solid foundations use AI to quickly generate edge-cases, variations, negative tests etc. 1 proper anchor test can provide you with enough to generate 10 or maybe even 20 tests using the same foundations. The bottleneck is probably creating those high-quality flows in the first place. I had pretty good result with what u/lastesthero suggested: using PW codegen to ground the tests in something that actually works, reducing hallucinations and AI spending a shitton of tokens figuring out how to use your app.
- u/hrabria_zaekr/nextjs
That makes a lot of sense! Thanks for your answer!
- u/Crypted39r/Playwright · mask editor builder
Appreciate it! Thank you!
- UserLSTested by
Overall, the app feels pretty polished and thoughtfully designed. The onboarding was easy to follow, and I liked that the recorder automatically replayed the test after saving - that made the flow feel smooth and fast. The tooltips during recording were also genuinely helpful without being annoying. The biggest friction for me was needing to connect GitHub before getting much real value from the product. As someone just wanting to quickly test a URL, it felt a bit limiting because a lot of features seem blocked until a repo is connected. The recording experience itself worked well for the most part, although I noticed some clicks inside the embedded browser didn’t always trigger navigation correctly. Other than that, the UI is clean, defaults make sense, and the overall experience feels solid.
Wed, May 6, 2026 · 08:58 AM - UsertrogdorTested by
wow
- u/Asipahio2 points · 1d ago
Totally agree. AI has shifted the bottleneck from creation to verification. I’ve noticed this in my own work too. The verification problem reminds me of code reviews before we had good testing practices. The real unlock for me was accepting that verification is now the high-value work. Creation is commoditized, but knowing what’s right? That’s where humans still matter.
- UserlisalacythompsonacaPeerPush
wow that’s pretty cool, thanks! Definitely a helpful tool for us vibe coders who kinda just cross our fingers and hope for the best 🫣 Are you launching on PeerPush? Once I get a chance to implement I’m happy to review!
May 15, 2026 - UserstuffyoushouldPeerPush
neat stuff!
- X / Twitter
@omkar_buildsOmkar · HermesDeploy founder · 9 baselines paired cleanSigned up for HermesDeploy and ran every screen through Lastest: home → login → full 5-step agent wizard (Name → Plan → Model → Telegram → Ready). 9 baselines, paired perfectly clean. That’s so awesome, thanks!
May 21 - X / Twitter
@georanklandGeoRankLand · signup flow tested end-to-endJust tested the signup flow end-to-end and verification is working cleanly. Links are single-use though, so if you clicked it twice that would trigger the error you’re seeing. Happy to manually verify your account or troubleshoot via DM.
May 21 - X / Twitter
@BillingServBillingServ · replying to Lastest walkthrough feedbackThank you for the feedback, glad to hear feedback about Altcha we use it everywhere we can, we are GDPR compliant so take data seriously.
Jun 30 - X / Twitter
@auditormusic19shantanu bhatt · replying to Lastest’s iGrow walkthroughThank you for this analysis!
Jun 26
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