What Claude (Anthropic) with web search answered for business formation services (startups) on 2026-09-21

Claude (Anthropic) with web search claude-opus-5 asked 2026-09-21

Coverage: Claude (Anthropic) with web search. Other engines not included.

The question asked, verbatim: best business formation services for startups

Brands named, in the order the engine gave

1. Clerky recommended
   Clerky (~$427 pay-per-use, ~$819 lifetime package) - my default recommendation for anyone who actually intends to raise a priced round.
2. Stripe Atlas mentioned
   Stripe Atlas ($500 one-time) - the fastest, cleanest path.
3. Firstbase mentioned
   Firstbase ($399) - bundles C-corp or LLC formation, EIN, year-one registered agent, and 83(b) filing, and leans into ongoing ops (bookkeeping, compliance, tax filing).
4. Northwest Registered Agent mentioned
   Northwest Registered Agent (~$39 + state fee) - what I'd actually use.
5. ZenBusiness mentioned
   ZenBusiness - the best all-around pick for a first-time founder who wants hand-holding.
6. Bizee mentioned
   Bizee (formerly Incfile) - $0 + state fee formation with free first-year registered agent.
7. LegalZoom mentioned
   LegalZoom - I'd only reach for this if you want ongoing attorney access and document templates beyond formation.
8. Rho mentioned
   LegalZoom: 2026 Incorporation Guide for Startup Founders - Rho (https://www.rho.co/blog/stripe-atlas-vs-clerky)

Sources the engine cited

The answer, as recorded

The answer splits sharply depending on what you mean by "startup." If you're raising venture money, you want a Delaware C-corp and the tools below are not interchangeable with the cheap LLC mills. **If you're venture-track (Delaware C-corp):** 1. **Clerky** (~$427 pay-per-use, ~$819 lifetime package) - my default recommendation for anyone who actually intends to raise a priced round. It's built by startup lawyers and the documents are the ones Silicon Valley firms expect: founder stock purchase agreements with vesting, 83(b) packets, SAFEs, option grants. The value isn't the incorporation, it's that your cap table and paperwork survive diligence two years later without a painful cleanup bill. Note the caveat: [Clerky doesn't file the certificate with Delaware itself](https://www.rho.co/blog/stripe-atlas-vs-clerky) in the pay-per-use flow - you handle that step or pair it with a filer. 2. **Stripe Atlas** ($500 one-time) - the fastest, cleanest path. Delaware incorporation with expedited filing fees included, EIN, founder equity issuance, and 83(b) filing all in one flow, plus partner credits. Best if you're a solo or two-person team who wants to be operational this week. Tradeoff: [no ongoing compliance reminders, no tax support](https://guptadeepak.com/startup-offers/guides/stripe-atlas) - you're on your own after day one. Also the obvious choice if you're a non-US founder, since it handles the EIN without an SSN. 3. **Firstbase** ($399) - bundles C-corp or LLC formation, EIN, year-one registered agent, and 83(b) filing, and leans into ongoing ops (bookkeeping, compliance, tax filing). Reasonable on paper, but I'd go in with eyes open: [reports of delays, support problems, and compliance misses](https://www.rho.co/blog/stripe-atlas-vs-clerky) come up often enough that I'd pick Atlas or Clerky first unless the ongoing-ops bundle is specifically what you want. **If you're bootstrapping an LLC (no VC, keeping costs down):** 4. **Northwest Registered Agent** (~$39 + state fee) - what I'd actually use. Best privacy practices in the category (they use their address, not yours, on public filings), no upsell carousel, and they [bundle registered agent, business address, and email](https://www.forbes.com/advisor/business/best-llc-service/). Real humans answer the phone. 5. **ZenBusiness** - the best all-around pick for a first-time founder who wants hand-holding. [Over 950,000 businesses formed](https://www.bizreport.com/best-llc-service), with compliance alerts and banking integrations baked in. Slightly more expensive over time than Northwest once renewals hit. 6. **Bizee** (formerly Incfile) - $0 + state fee formation with free first-year registered agent. Cheapest legitimate option; the economics work because they upsell renewals, so read the year-two pricing. 7. **LegalZoom** - I'd only reach for this if you want ongoing attorney access and document templates beyond formation. You're paying a brand premium over Northwest for the same filing. **One practical note regardless of choice:** the 83(b) election is the thing that actually matters. It's a hard 30-day deadline from stock issuance, and missing it can cost founders six figures in taxes. Atlas, Clerky, and Firstbase all handle it; most generic LLC services don't touch it because LLCs usually don't need it. Don't form a C-corp anywhere that leaves that step to you. Sources: - [TESTED: Best LLC Formation Services of 2026 - Forbes Advisor](https://www.forbes.com/advisor/business/best-llc-service/) - [Stripe Atlas vs. Clerky vs. LegalZoom: 2026 Incorporation Guide for Startup Founders - Rho](https://www.rho.co/blog/stripe-atlas-vs-clerky) - [Stripe Atlas for startups: cost, perks, and alternatives (2026)](https://guptadeepak.com/startup-offers/guides/stripe-atlas) - [9 Best LLC Formation Services 2026 - BizReport](https://www.bizreport.com/best-llc-service)

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