Autonoma alternative: Two AI testers. Two sources of truth.
Autonoma is the most transparent of the agent-testing platforms, and this page treats it that way. The real split is upstream of the agent: where the expected behavior comes from, where the browser lives, and what the meter counts.
Last reviewed · See a real graded run
What Autonoma genuinely gets right
The category's most honest verdict taxonomy
Six named verdicts — Passed and Bug are trusted; environment failures, test-data issues, engine artifacts and plan mismatches count as noise, not failures. The trust-rate formula is published, and a confirmed bug raises suite health. Most vendors don't publish this accounting. They print it.
Environments and test data, actually solved
Every PR gets an isolated full-stack preview with a live URL, and their Environment Factory seeds fresh, isolated test data so every run starts from a known state. Most of the rivals we researched don't document test-data provisioning at all.
A real open posture
Tests are plain markdown in your repo, the Test Planner is MIT, the platform source is public, and self-hosting is free with no feature limits. One license nuance below — but "deploy it, extend it and fork it" is a stance we respect.
A test generated from the code it is supposed to judge
Autonoma's authoring model is codebase-first, in their own words: it "generates a suite of natural-language tests from your codebase, and an agent figures out how to run them." The planner CLI drafts markdown tests into a qa-tests/ directory. As artifacts go, genuinely good — natural-language intent, no selector maintenance, versioned in your repo.
But notice where the expectations come from. Their launch post says it in their own words: "Autonoma's engine reads your codebase, you should be able to read ours". A spec inferred from the implementation inherits its mistakes — if the code quietly does the wrong thing, a test derived from it can encode the wrong thing as expected. Their mitigation is real: the planner has review checkpoints at each stage. The safeguard is you.
- Their expectation authority: your codebase, read by their planner, corrected by your review.
- Ours are three, and independent: your documentation (what the app should do), your repo (what exists to test), the live accessibility tree (what is actually on screen). Expectations never come from the implementation under test alone.
- Why it matters: a single-source suite grades the implementation against itself. Grading against stated intent catches the bug the code already believes in.
TestAutomate crawls your docs through your real browser and grades verdicts against that stated intent — none of the rivals we researched ingests documentation as the expectation authority. The artifact is intent too: prompt plus expected outcome in versionable YAML, no selector layer anywhere.
Their cloud builds your app. Your Chrome already runs it.
Autonoma's default is elegant for GitHub-centric teams: their cloud builds an isolated preview of your app per PR, seeds it, and drives it with real browsers — Playwright for web, Appium for mobile.
The wall shows up when your app does not live where their cloud can build it. Their bring-your-own-deploy option has your pipeline call their cloud with a URL their cloud can reach — and we could find no documentation of VPN or private-network reach. Their own page prints the sharpest caveat we could have written: pointing it at non-tenant-scoped data "writes test data into your real database, in front of your users, and it cannot be taken back." The documented way onto your own network is self-hosting the whole platform — free, but now you operate Node, PostgreSQL, Redis and Temporal.
- TestAutomate drives your actual Chrome. Real logged-in sessions, behind your VPN and SSO, on real staging data — the testing browser already has the access. No preview build, no signed callback.
- Unattended runs go both ways. A named Auth Catalog (email/password, Google, Okta, magic links, TOTP) signs in for scheduled runs, with a live view and click-to-take-over when SSO or 2FA needs a human.
- Runs stay isolated by design. Parameterized tests with a setup/cleanup lifecycle and enforced order-independence — discipline on your real data, not a rebuilt copy of it.
Mid-run, our agent can also just ask you, instead of guessing. Theirs rebuilds a clean world per PR; ours tests the world you actually ship into.
Usage-priced, credit-opaque
Autonoma's pricing shape is likable: $0 to start, no credit card, 100K credits free, then $100 per 150K credits with no minimum — self-hosting free forever (their homepage pricing section, as of September 1, 2026). No seats, no per-test tax. The problem is the unit. What one credit buys is not published in user terms anywhere we could find.
- The conversion lives inside. Their billing architecture describes AI cost converted at an internal credits-per-USD rate and preview runtime metered per vCPU-hour. You can know the price of credits without ever knowing the price of a run.
- The meter does not stop. Their billing docs describe a deduction routine that "never refuses", clamping the balance at a credit floor. TestAutomate inverts that: a pre-run dollar estimate, a live dollar meter, and a hard budget ceiling that pauses the run before overspend.
- Our arithmetic is checkable. Bring your own key and model spend passes through at your provider's list price, never marked up. No key? Managed credits show "provider price + 15%", both numbers on screen. Either way the unit is dollars, not a token you cannot price.
For the record: a "$499/month unlimited parallels" plan appears in their own April 2026 blog comparison but not on the homepage — we treat the homepage numbers as the offer.
Four design choices, one theme
Expectations from outside the code
Docs state intended behavior, the repo enumerates what exists, the runtime tree reports what is real. The implementation never writes its own exam.
Test from inside the wall
Your Chrome, your session, your VPN, your staging data. The reachability problem their preview factory exists to solve does not occur.
Confirm before you cry wolf
Pass / fail / blocked, advisory flags, labeled retry-passes — and no failure is reported until a stronger model re-drives the journey and agrees. Nobody else does two-model failure confirmation.
Meter in dollars
BYOK pass-through at provider cost, live dollar meter, hard ceiling that pauses before overspend. Managed keys show provider price + 15%.
Side by side
| Autonoma | TestAutomate | |
|---|---|---|
| How tests are authored | Planner CLI reads your codebase and drafts natural-language markdown tests, with review checkpoints | Plain English typed or voice-dictated, plus instant draft suites from docs, repo and live runtime |
| Where expectations come from | Inferred from the implementation ("Autonoma's engine reads your codebase"), corrected by human review | Three independent authorities — docs (intent), repo (enumeration), runtime accessibility tree (reality) |
| Stored artifact | Plain markdown with YAML frontmatter in your repo — genuinely selector-free, interpreted by their agent | Prompt + expected outcome in versionable YAML — also selector-free; one-click full-suite export |
| Where tests execute | Their cloud builds an isolated full-stack preview per PR and runs Playwright/Appium browsers; free platform self-host (Node, PostgreSQL, Redis, Temporal) | Your own Chrome; self-hosted runner or cloud browsers for unattended runs, with WebRTC live view |
| VPN'd staging & SSO reach | Not documented; BYO-deploy URLs must be reachable from their cloud, which drives them — self-hosting is the documented route inside | Already inside — your browser, your logged-in session, your network |
| Test data | Environment Factory seeds fresh, isolated data per run; their docs warn BYO-deploy can write test data into your real database | Real staging data in your session; parameterized tests, setup/cleanup lifecycle, enforced order-independence |
| Verdict grammar | Six verdicts — Passed, Bug, plus four noise classes — with published trust-rate math (best-documented in the category) | Pass / fail / blocked, advisory flags for renamed-but-equivalent UI, "passed on retry" labels |
| Failure confirmation | Single agent decides; keyword heuristics tag stuck-reasoning failures as loops; second-model failure confirmation not documented | A stronger model re-drives every failure and must agree before it is reported |
| Evidence per verdict | Before/after screenshots per step, video, sanitized agent logs, written verdict on the PR | Scrubbable replay + itemized verdict per expectation, share-by-link, PDF export, evidence attached to filed bugs |
| Bug-tracker loop | Reports on the GitHub PR and their dashboard, Slack integration; Jira/Linear issue filing not documented | Dedupe against the live tracker, confirm-gated filing with evidence, close-fixed transitions after re-verification, sprint UAT on Jira/Linear |
| Pricing model | 100K credits free, then $100 per 150K credits, no minimum; self-hosted free (homepage pricing, as of Sep 1, 2026) — what one credit buys is not published | BYOK at provider cost, never marked up, with live dollar meters and hard ceilings; managed keys at provider price + 15%, shown |
| License & lock-in | Planner MIT; platform BSL 1.1 converting to Apache 2.0 in 2028 (source-available); tests run via an agent runner, Environment Factory SDK code lives in your backend | Human-readable YAML export, entire stack (Node + Postgres) self-hosts, tenant-scoped data, sealed secrets |
One footnote on the license row, since their homepage says "open source" without qualification: the planner genuinely is (MIT), and BSL 1.1 converting to Apache 2.0 in 2028 is a serious commitment — but BSL is source-available, not OSI open source, until then. Worth knowing; not worth sneering at.
TestAutomate vs Autonoma, asked directly
Don't both store plain-language tests with no selectors?
Yes — and we will not pretend otherwise. Autonoma stores markdown intent in your repo; TestAutomate stores a prompt plus expected outcome in YAML. The artifacts are cousins. The divide is upstream: their expectations are inferred from your codebase, with human review as the corrective; ours come from documentation, repo and live runtime independently — the implementation is never the sole author of its own expected behavior.
Can Autonoma test an app behind my VPN?
VPN and private-network reach are not documented. Their default is their cloud building and hosting a preview of your app; bring-your-own-deploy hands their cloud a URL to drive — so the URL must be reachable from their cloud. The documented route onto a private network is self-hosting their platform. TestAutomate runs in your own Chrome, already behind the VPN and already signed in through your SSO.
Isn't Autonoma fully open source?
Partly, genuinely; partly, not yet. The Test Planner is MIT. The platform is public under the Business Source License 1.1, converting to Apache 2.0 in 2028 — source-available today, OSI-open on a dated promise. Self-hosting is free with no feature limits either way, which matters more than the label. TestAutomate's answer to lock-in: portable YAML tests, one-click full-suite export, a stack that self-hosts on Node + Postgres.
Which one costs less to run?
We can only compare what is published. As of September 1, 2026, their homepage offers 100K credits free and $100 per 150K credits, no minimum — but no published statement of what one credit buys; the conversion from model spend to credits is internal. TestAutomate's spend is checkable arithmetic: your own API key at provider list price with zero markup, a live dollar meter, a hard ceiling — or managed keys at provider price + 15%, both numbers shown.
Does TestAutomate cover mobile apps like Autonoma does?
No. Autonoma runs mobile tests through Appium alongside Playwright for web — if native mobile coverage gates your decision today, they are the safer pick, and the full comparison grid says so too. TestAutomate is web-first on purpose: your Chrome, your sessions, your staging.
Test the app you actually ship
Not a rebuilt preview of it — real staging behind your VPN, in your own logged-in Chrome, graded against what your docs say it should do, at your provider's list price.