A free tool that finds brandable domain names you can actually register.
Describe your business, product, or project. DomainComb asks Claude (Opus 4.8) for brandable name ideas, then checks each one for real availability and shows you the domains you can actually register, each with its price. (Most prices come straight from the registrar; a few newer extensions show a typical estimate.) Want more options? Hit “Keep trying” for a fresh batch.
I kept getting stuck in the same loop: think of a great domain name, discover it's already taken, and start over. DomainComb closes that loop — every name it shows you is available to register right now.
Every search costs me a little money — it runs real AI and domain-availability checks behind the scenes. Rather than charge for it or clutter it with ads, I'm hoping that enough people who find it useful will leave a tip to keep it running and free for everyone. If DomainComb saved you some time, a tip genuinely helps.
For the curious. DomainComb runs entirely on a single Cloudflare Worker (TypeScript) — no separate backend, no database in the request path.
Name generation. Ideas come from Claude Opus 4.8 via the Anthropic API, using structured output and adaptive thinking. The model streams its response, so names appear one by one as they're generated rather than all at once.
Availability checking. This is the hard part — there's no single API that reliably covers every extension. DomainComb routes each name to the right source:
domain-check) for most extensions — real-time availability and live pricing..io, .ai, .me, .us, and others) — the official registry protocol, queried directly..co, and as a fallback whenever an RDAP lookup is inconclusive.Checks run as the names stream in, so each result flips to available or taken in real time. Where a registry doesn't expose pricing, the figure shown is a typical estimate (labelled as such) rather than a live quote.
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