Pay for proof, not promises.

Yes. The Free plan is free forever and needs no credit card. You get 30 credits every month to build or review code however you like, at the same full-strength verification the paid plans use, up to a 3/3/3 run. It's a real working tier, not a stripped-down demo.

A credit is the unit you spend to run Fusion. Simplest way to think about it: a standard, fully verified run costs 3 credits. Lighter runs cost fewer; deeper ones cost more. Your plan includes a monthly bucket of credits, and you can buy more if you need them.

You choose the depth, and the depth is the price. A quick single-reviewer pass is 1 credit; a full cross-checked verified run is 3. The price is the same whether you're building new code or reviewing existing code. On Pro, an extra credit is 66¢.

Before a run, you set what "done right" means: the tests that must pass and the criteria that must hold. If the run delivers that, you spend the credits. If it fails the gate, crashes, or errors out, you're not charged. You never pay for a run that didn't deliver.

Two ways. Most charge per seat every month whether or not the tool caught anything; we charge per run, and only when the run actually delivers what you asked for. And they hand you one AI's opinion. A Fusion verified run uses multiple different-vendor models competing and cross-judging, which is why it can carry a Verified stamp.

It's how many independent agents work your run: candidates / judges / integrators. A 3/3/3 run has 3 different models attempt the work, 3 independent judges score them blind, and 3 integrators produce the final. Then they cross-check each other. More depth means more independent verification, and it sets the credit cost.

1/1/1 is a single model reviewing the work. Fast and cheap, fine for a sanity check, but still one opinion. At 2/2/2 and up you get multiple different-vendor models competing and cross-judging each other blind, which is what can earn the Verified stamp: an independent, cross-checked result rather than one model's guess.

Verified means the run cleared its objective gate, the hard criteria in the Receipt are satisfied or explicitly waived, and independent judging has no unresolved split. A 2/2/2 run or deeper gives you the cross-vendor roster that can earn that stamp. A 1/1/1 run gives honest evidence from a single reviewer, but we won't call it Verified. We keep that word strict on purpose.

On Pro and Team, yes, unused credits roll over up to 2× your monthly amount. Free-plan credits reset each month.

Because runs come in different depths, you shouldn't pay the same for a 1-credit check as for a 3-credit verified run. Credits let you dial depth to the job and pay only for what you use, and they let a whole team share one flexible budget instead of buying rigid per-review packs.

On Free, Pro, and Team, yes. You connect your own AI accounts (Anthropic, OpenAI, Google, or an aggregator like OpenRouter), and those providers bill you directly. Fusion never marks up or resells tokens; you pay us for the verification, not the compute. On Enterprise, we supply the models so you bring no keys.

Our recommendation: if you want the best results, use the top frontier models. Fusion isn't about saving money on cheap models. It's about return on investment and trust in your codebase, where a competition among the strongest models produces a result you can stand behind. If the goal is just spending less, a free model elsewhere will do; if the goal is the best verified outcome, run the best models through Fusion.

Pro and Team are priced per person: $19/user/month on Pro (billed annually), $79/user/month on Team. Each user brings a bucket of credits (90 on Pro, 300 on Team), and on Team those credits pool across everyone. Team requires at least 2 users because it's built for collaboration; pooled credits, shared roles, and team controls only make sense with a team. Solo users are perfectly served by Free or Pro.

Annual is cheaper. Pro is $19/user/month paid annually vs $29 month-to-month; Team is $79 vs $89. Same product either way, annual just saves money for committing up front.

Keep going by buying extra credits at your plan's rate, 99¢ each on Free, 66¢ on Pro, 55¢ on Team, or upgrade. On Team, admins set how many credits each user can spend, so the shared pool stays under control.

You can cancel anytime. We don't offer refunds. Instead, when you cancel you keep access through the end of the period you've already paid for, then it stops. Enterprise cancellation follows the terms of your agreement.

Start from how many verified runs you expect. A standard verified run is 3 credits, and Team includes 300 credits per user per month. A 5-person team has 1,500 pooled credits, roughly 500 verified runs a month, before any extras. Heavy months add 55¢ per extra credit, and admins can cap per-user spend.

Enterprise is a custom contract sized to your usage: verified runs per month, the depth you need (up to 5/5/5), and requirements like on-prem deployment, governance, and SLAs. Managed inference means Fusion supplies the models, so your team brings and manages no API keys. One vendor, one invoice, billed per verified run.

On the local-first plans, runs execute on your machine. The AI agents inspect the repository through the tools and accounts you already use, under the vendor agreements you already have. Fusion does not add a separate code-upload path to our servers. On Enterprise, code is handled inside your controlled environment under contract, with SSO, audit logs, and on-prem options. Details: the fine print on our about page.

Yes, genuine open-source projects use Fusion free through our Open Source program. To qualify, the repo must be public under a recognized open-source license (MIT, Apache, GPL and similar), non-commercial, and you need to be the owner or an admin. Fusion's own platform stays closed-source; free for open-source projects is about who can use it, not about opening our code.

Send your name, the repository link, and its license to hello@fusioncoding.ai. We run a light eligibility check. Once approved, Fusion turns on free for that project. Your public pull requests start getting Verified Receipts at no cost. No sales call, no credit card.