QA Wolf vs Bug0 is a $6,000/mo price gap. QA Wolf starts at roughly $8,000/mo; Bug0's only publicly listed plan as of July 2026 is Managed at $2,500/mo (forward-deployed engineer, up to 500 flows, month-to-month). Simz is the only option here that includes human QA engineers from $300/mo.
How do QA Wolf, Bug0, and Simz differ?
All three test web apps, but the similarity ends there. QA Wolf is a managed-service contractor that builds and owns your test suite. Bug0 offers one publicly listed plan (Managed, $2,500/mo) combining a forward-deployed engineer with AI-generated Playwright tests. Simz is a hybrid platform where AI agents and human QA engineers work together on every plan.
| QA Wolf | Bug0 | Simz Sandbox | Simz Lab | |
|---|---|---|---|---|
| Price (as of July 2026) | ~$8,000/mo min | $2,500/mo | $300/mo | $1,000/mo |
| Human QA engineers | Yes (their team) | Yes (1 forward-deployed engineer) | Yes (included) | Yes (included) |
| AI test agents | Yes (Playwright) | Yes | Yes | Yes |
| Test authoring | Done-for-you | Done-for-you | Both (natural language + human) | Both |
| Human reviews every failure | Yes | Yes | Yes | Yes |
| Dedicated Slack channel | Yes | Yes | Yes | Yes |
| GitHub / PR integration | Yes | Yes | Yes | Yes |
| Self-healing tests | Yes | Yes | Yes | Yes |
| Contract minimum | 12 months | Month-to-month | Month-to-month | Month-to-month |
| Published pricing | No (demo-gated) | Yes (bug0.com/pricing, July 2026) | Yes | Yes |
| AI tests/mo | Unlimited (in scope) | Up to 500 flows | 150 | 1,000 |
| Human tests/mo | Included (labor-based) | Unlimited (1 engineer) | 200 | 600 |
| Best for | Mid-market/enterprise with budget | Growth-stage startups | Small teams, early-stage | Startups scaling QA |
What does QA Wolf cost, and what do you get?
QA Wolf does not publish pricing. Based on Vendr's deal database and third-party pricing analyses (as of June 2026), the per-flow rate runs $40-70/flow/month, entry point around $8,000/mo for 200 flows, median annual contract $83,000-$90,000 per Vendr and Autonoma AI. All contracts require a 12-month minimum.
What you get for that spend: QA Wolf's engineering team writes your entire E2E suite from scratch, maintains it as your app changes (no "flaky test debt"), runs tests on every deploy, triages failures within 24 hours, and files bugs with reproduction steps. They own the outcome. Coverage targets are typically 80%+ of critical flows.
That model works for teams that want to offload QA entirely and have the budget to match. It does not work for a 5-person startup that needs QA in week one.
QA Wolf is also building a self-serve direction: a June 2026 blog post from QA Wolf announced a single-prompt AI test platform in early access, which suggests the company is reaching down-market. That product has not launched at time of writing; pricing is unknown.
What does Bug0 cost, and which plan includes humans?
Bug0's only publicly listed plan as of July 2026 is Managed at $2,500/mo flat (per bug0.com/pricing, July 2026). That price includes a forward-deployed engineer plus Bug0's AI agents, up to 500 user flows, month-to-month billing with no annual contract required.
Bug0 Managed ($2,500/mo flat for up to 500 user flows): done-for-you. A forward-deployed engineer plus Bug0's AI agents handle test planning, generation, verification, and release gating. The engineer reviews every failure and files bugs before they reach production. Self-healing Playwright tests auto-update when your UI changes. Month-to-month billing, no annual contract required.
Bug0 previously offered a $250/mo AI-only "Studio" self-serve tier, where you wrote and ran tests yourself with no human QA involvement. That plan is no longer listed on bug0.com as of July 2026. Teams that previously used Studio for budget AI-only test automation should evaluate current alternatives, as Bug0's current entry point is now $2,500/mo (human-inclusive).
$2,500/mo for a forward-deployed engineer is competitive pricing when you consider the loaded cost of dedicated QA headcount. If you assume that engineer works 40 hours/week at a loaded rate of $60/hr, their time alone would be $9,600/mo. Bug0 Managed's $2,500 flat covers fractional but real human oversight.
Bug0 is genuinely strong at AI-generated, self-healing Playwright tests. The pricing is transparent. The limitation is structural: one engineer is shared across your flows, not dedicated full-time.
Where does Simz sit in this comparison?
Simz is in pre-launch. What makes it relevant to this comparison is the price-human gap it occupies. As of July 2026, Bug0's floor is $2,500/mo (Managed, human-inclusive). No other vendor bundles human QA engineers below that floor. Simz Sandbox at $300/mo changes that, including 200 human-run tests per month alongside 150 AI tests.
The Simz Sandbox vs Lab pricing breakdown is on the /pricing page. The short version: Sandbox ($300/mo) covers one project with 2 users; Lab ($1,000/mo) covers 3 projects with unlimited users and 1,000 AI + 600 human tests/mo.
The hybrid approach addresses a documented failure mode. According to Prufa's June 2026 audit of 49 Show HN launches, 78% shipped a critical bug on day one. AI-generated tests catch regressions on known paths; humans catch the things AI does not know to look for. "The app passed every test I knew how to run" is not the same as "the app works." A second set of eyes matters specifically because they do not share your assumptions.
Simz is not the right choice for a 200-engineer org that needs 1,000 flows covered and a contractual SLA. QA Wolf is the answer for that. But for teams where $2,500/mo (Bug0) or $8,000/mo (QA Wolf) is out of reach, the gap has been empty until now.
Which service fits which team?
Use QA Wolf if: you have a mid-market or enterprise engineering org, you want to fully outsource test ownership, budget is $8k/mo+, and you are comfortable with a 12-month contract. QA Wolf's zero-flake guarantee and 24-hour triage are genuine differentiators at that price.
Use Bug0 if: you want done-for-you QA with human oversight, you are a growth-stage startup, and $2,500/mo is in budget. Bug0 Managed covers up to 500 flows with a forward-deployed engineer and self-healing Playwright tests. Month-to-month billing removes lock-in risk. Note: Bug0 previously offered a $250/mo AI-only Studio self-serve tier; that plan is no longer listed as of July 2026. Teams looking for AI-only self-serve test tooling should evaluate current alternatives independently.
Use Simz if: you need both AI testing and human verification at a price that fits a startup budget, you ship fast (webhook, GitHub PR, or manual triggers), or you want to @mention a QA engineer on a specific flow without a contract negotiation. For more detail on how Simz compares to QA Wolf across a wider field of alternatives, see the /compare/qa-wolf-alternatives page. The /blog/qa-pricing-decoder normalizes every vendor to a $/human-test metric if you want to run the math yourself before talking to anyone.
Simz offers 5 free test runs so you can see exactly what AI plus human testing surfaces on your app before committing to a plan.