Bug0 manages your QA. agent-qa turns every run into memory your agents keep.
Bug0 leans into managed QA help. agent-qa hands your own team the open framework, test files, model routing, runtime evidence, with no outsourced operating model in the loop.
Try agent-qa, the source-available way to let agents learn from every proof.
agent-qa vs Bug0
| Capability | agent-qa | Bug0 | Details |
|---|---|---|---|
| Source access | Bug0 is not positioned as a repo-owned framework with published source, so behaviour you disagree with is a support ticket. With agent-qa it is a pull request. | ||
| Repo-owned YAML | Bug0 keeps the test intent inside its own product. agent-qa keeps intent, config, hooks, memory and suites beside the code they cover, where your engineering process already works. | ||
| Coding-agent native | A coding agent cannot click through a hosted editor. agent-qa ships MCP tools, packaged Skills and a CLI, so the agent that changed the code writes the test, runs it and reads the failure without leaving the loop. | ||
| Bring your own LLM | Whoever picks the model sets your quality ceiling and your bill. agent-qa lets you point at any provider, any compatible endpoint, or a model on your own hardware, and change it in one line. | ||
| Local and CI execution | One command on a laptop, in CI, and from an agent. No run depends on somebody else's control plane being up, and nothing queues behind another tenant. | ||
| Web and mobile QA | Web, Android and iOS from the same natural-language flow and the same evidence model. The surface is a target named in a file, not a different product tier. | ||
| Memory, cache, hooks | Execution memory, a validated action cache and sandboxed hooks compound. A suite that has been running a month is faster, cheaper and better informed about your app than the day it was written. | ||
| No platform lock-in | Every durable asset stays in your repository. Cancel agent-qa tomorrow and the tests, the memory and the evidence are still there and still readable. |
Why teams switch from Bug0
Runs compound instead of resetting
Bug0 runs a test and forgets. Every run starts from nothing, which is why the hundredth run costs exactly what the first one did. agent-qa writes what it learned into memory committed beside your tests, so the next run starts where the last one finished and the suite gets better at your app on its own.
No license fee, no seat math
Bug0 runs on managed-service pricing where the vendor's margin is built into every test cycle, and that number grows with the coverage you add. agent-qa has no paid tier or licence fee for FSL-permitted use and its source is available under FSL-1.1-ALv2. You pay for tokens and infrastructure you control, on whichever provider is cheapest this quarter, and the cache cuts that too.
Outsourced QA never compounds in-house
When Bug0's service finds a bug, the knowledge of how it was found stays with the service. When agent-qa finds one, the test, the memory entry, and the run artifacts all land in your repo, your team and your coding agents get permanently smarter.
Bug0 rents you a QA operating model. agent-qa gives your team one, source available, agent-native, and accumulating memory with every release.
Frequently asked questions
Is agent-qa a good Bug0 alternative?
Yes, and the reason is structural rather than a feature count. Bug0 is a managed QA offering where the vendor operates the testing loop for you, which means the asset you are building lives on their side of the line. agent-qa is a source-available QA agent with no paid tier, governed by FSL-1.1-ALv2: tests are plain-English YAML in your repository, runs execute on your laptop, in your CI, or from your coding agent, and every run writes back into memory committed beside the tests. The suite gets better at your app whether or not you renew anything.
How much does agent-qa cost compared to Bug0?
Bug0 is priced on managed-service plans, so the bill tracks how much you test. agent-qa has no paid tier, no seats and no platform fee; FSL-1.1-ALv2 governs permitted use. You pay for the model tokens and infrastructure you already control, on the provider you choose, and the validated action cache takes roughly 60% of the tokens off a matched rerun. Adding coverage does not add a line item.
How do I migrate from Bug0 to agent-qa?
You are re-describing intent, not porting code, which is why this is far smaller than a normal test migration. Ask what flows Bug0 currently covers, then encode each as an agent-qa YAML test. You convert a service dependency into a repo asset. Run npx agent-qa init, write each critical flow as a plain-English YAML test, and let the runtime work out the selectors and the recovery. Most teams move a smoke suite in an afternoon, and there is nothing to un-pick later because the output is files in your own repository.
Does agent-qa cover web and mobile like Bug0?
Yes, and from the same file. agent-qa runs end-to-end tests on web, Android and iOS with one natural-language format, one memory store and one evidence model, so a flow written once survives being pointed at another surface. agent-qa treats web and mobile as equal targets under one repo-owned contract, wherever your product runs.
Is a managed service easier than running agent-qa myself?
Day one, maybe. Day ninety, no: agent-qa's authoring is plain English, runs are one CLI command or one MCP call from your coding agent, and memory plus cache mean the suite maintains itself more with every run. Easy that compounds beats easy that invoices.
Sources
This page is based on public product and documentation sources. Verify current features and pricing with each vendor before making a purchase decision.
Where agent-qa pulls ahead of Bug0
The parts of agent-qa that answer what Bug0 leaves you carrying.
Natural-language tests
Write actions and assertions in plain English; agent-qa resolves them against the live interface.
Learn about natural language testsPlain-English YAML
Describe the behavior once; it stays as reviewable YAML in your repository.
Learn moreExecution memory
Turn successful runs into reviewable, evidence-backed memory that makes every future run faster.
Learn about memoryProven before it is used
New knowledge must pass replay and live evidence before guiding a run.
Learn moreFaster warm runs
Reuse proven flows and supersede stale facts instead of rediscovering them.
Learn moreA run leaves evidence
Elements that resolved, a flow that worked, and timings that are real, all attached to the steps that produced them.
Built for Humans & Agents
Humans and agents author the same reviewable YAML, backed by your repository, skills, and MCP.
Learn about MCP and skillsSkills and MCP for agents
Skills teach the workflow; MCP validates, runs, and returns artifacts.
Learn moreVersion controlled, built for teams
Tests, knowledge, and rules stay as reviewable files shared by teammates, agents, and CI.
Learn about configurationFiles, not a database
Tests, config, memory, and rules stay as files your team can inspect and own.
Learn moreLearning arrives as a diff
New memory and issues arrive as pull-request diffs, with their evidence.
Learn moreOne commit everywhere
Humans, coding agents, and CI share the same knowledge from one commit.
Learn more- Tests
- Configs
- Memory
- Self improvement
- Knowledge
- Engineeragent-qa
- QA engineeragent-qa
- Coding agentagent-qa
- CIagent-qa
* This comparison is based on publicly available information. Product capabilities and pricing can change; verify details with each vendor before making a purchase decision.