Firstbase is a well-known incorporation service for founders who want to start a US company online, including many founders outside the US. Firstbase says more than 30,000 companies have started with it. The model is formation plus a set of ongoing products: registered agent and compliance, a mailroom, accounting, and tax filing.
This review covers what Firstbase includes, what the add-ons cost, who it fits, and which alternatives suit specific types of founders. Rho sells a competing incorporation product, so we disclose that where it comes up and stick to verifiable facts everywhere else.
Firstbase lists Start at $399 one time; on October 17, 2026 its pricing page showed an offer price of $99, with the state fee paid separately.
Start covers LLC or C corp formation in Delaware or Wyoming, expedited EIN setup, and essential documents such as a stock purchase agreement and bylaws.
The registered agent is an add-on: Firstbase Agent is $299 per year per state.
Other products include Mailroom from $35 per month, Accounting at $599 per month, Tax Filing at $1,799 per year, and the Firstbase One bundle at $199 per month billed yearly.
When you incorporate a Delaware C-corp with Rho ($400), your business account opens in the same flow, subject to approval. Rho also forms LLCs for $349 all in, state filing fee included.
The short answer
Firstbase is a legitimate formation service that lists its Start package at $399 one time, shown on October 17, 2026 with a $99 offer price plus the state fee, and it forms LLCs and C corps in Delaware or Wyoming. The registered agent is a $299 per year add-on, and Firstbase also sells ongoing products like Mailroom, Accounting, and Tax Filing. It fits founders who want formation and back-office services from one vendor.
Best for: Firstbase is best for founders who want formation plus an operations layer from one vendor. Rho is best for founders forming a Delaware C-corp who want their company formed and a business account opened in the same flow, subject to approval.
We assess formation options on price, what's included, and whether a business account can open in the same flow as formation.
What is Firstbase?
Firstbase (firstbase.io, not to be confused with firstbase.com, an unrelated company) positions itself as an all-in-one platform for starting and running a US company: incorporation, registered agent, virtual mailroom, bookkeeping, and tax filing under one login.
For every plan and add-on, see our full Firstbase pricing breakdown.
Firstbase says it is trusted by founders in 188 countries. If you are working through the full process for the first time, our guide on how to incorporate a startup covers the steps any provider will walk you through.
Firstbase pricing in 2026
Verified on firstbase.io on October 17, 2026:
Product | Price | What it is |
|---|---|---|
Firstbase Start | $399 list; $99 offer shown, plus state fee | LLC or C corp formation in Delaware or Wyoming, expedited EIN setup, essential documents |
Firstbase Agent (Autopilot) | $299/yr per state | Registered agent, compliance reminders, annual report and franchise tax filings, BOI filings |
Firstbase Mailroom | $35/mo Basic ($315/yr), $50/mo Premium ($350/yr) | US business address, mail scanning and forwarding |
Accounting | $599/mo, or $5,990/yr | Bookkeeping with reconciliation and bookkeeper live chat |
Tax Filing | $1,799/yr | Corporate returns for C corps and multi-member LLCs ($899 for non-US-owned single-member LLCs) |
Firstbase One | $199/mo, billed yearly at $2,388 | Bundle of Mailroom Premium, Registered Agent, Accounting, and Tax Filing |
Formation is the entry point, and the recurring products are where most of the ongoing spend happens. A company running Agent plus Mailroom Basic on annual billing pays $614 per year for those two products.
What is included in Firstbase Start
According to Firstbase's pricing page, Start includes:
Formation: Company formation in Delaware or Wyoming.
EIN: Expedited tax ID (EIN) setup.
Filing fees: Zero filing fees for all required documents.
Documents: Essential documents, such as a stock purchase agreement and bylaws.
Banking: Help opening a business bank account with one of Firstbase's banking partners.
Extras: VC discoverability, more than $350K in deals and rewards, and lifetime expert support.
Firstbase notes that registered agent services are required for incorporation; Firstbase Agent covers that for $299 per year per state. Firstbase's home page also says founders can file their 83(b) election for free and on time.
Firstbase highlights
Built for international founders. EIN setup, a US address, and banking introductions are in one place.
Wyoming as an option. Founders who want a Wyoming company can form one here.
One dashboard. Formation, mail, compliance, books, and taxes in a single account.
A bundle option. Firstbase One combines Mailroom Premium, Registered Agent, Accounting, and Tax Filing for $199 per month billed yearly.
Things to know before you buy
Registered agent is an add-on at $299 per year per state.
The state fee is paid separately under the current Start offer.
Recurring products add up. Agent, Mailroom Basic, and Tax Filing together come to $2,413 per year on annual billing.
Who Firstbase is for
Firstbase fits best if you are a founder, especially a non-US founder, who wants one vendor for formation, a US address, compliance, and eventually books and taxes, and you value that consolidation. It also fits founders forming a Wyoming company who want managed compliance.
Founders forming a Delaware C corp who mainly need formation, an 83(b) election, and a business account can compare the alternatives below.
Firstbase alternatives
We compared the full field in our roundup of the best incorporation services. The short version:
Rho (yes, that's us): Delaware C-corps for $400, with attorney review, registered agent covered for year one, 83(b) election support, and a business account opened in the same flow, subject to approval. Rho also forms LLCs for $349 all in, state filing fee included. More below.
Stripe Atlas ($500 one time): Delaware C corp or LLC, including government fees, a company tax ID, 83(b) election filing, templates, and the first year of registered agent service, then $100 per year. Full breakdown in our Stripe Atlas review, and a head-to-head in Stripe Atlas vs Firstbase.
Clerky ($819 lifetime package, or $427 incorporation): Delaware C corporations and startup legal paperwork from a company run by startup attorneys.
doola (Starter $297 per year plus state fees): US LLC or C corp formation for founders from around the world, with registered agent service included in Starter.
Bizee ($0 plus state fee): Basic LLC formation with one free year of registered agent service.
LegalZoom (corporations from $149 plus state fees): A well-known brand with packages at $149, $329, and $349.
Where Rho fits
Rho forms Delaware C-corps for $400. For a C-corp, every formation document is reviewed by a licensed attorney, the registered agent is covered for year one, your EIN application is filed for you, and you get 83(b) election support. C-corp filings take about 24 hours, with the clock starting the next business day after you submit. Rho also forms LLCs for $349 all in, state filing fee included.
When you incorporate a Delaware C-corp with Rho, your business account opens in the same flow, subject to approval: banking, invoicing, cards, and bill pay, all live the moment your account is approved. For the C-corp flow, account opening requires at least one US-based owner or officer, a US operating address, and a business in an eligible industry.
Best for: Best for founders forming a Delaware C-corp who want their company formed and a business account opened in the same flow, subject to approval. Learn more at Rho Incorporation.
Verdict
Firstbase is a legitimate, well-built service, and for founders who want the back office from one vendor, it is one of the strongest options available. Judge it on total cost over the first two years rather than the Start price alone, since the registered agent, mailroom, and tax products are where the ongoing spend lands.
Whichever provider you pick, budget for Delaware franchise tax and state fees as ongoing costs. Delaware revised its fee schedule effective August 1, 2026. According to the Delaware Division of Corporations (figures as of October 17, 2026), a corporation's certificate of incorporation starts at $109, and a corporation owes a $50 annual report fee plus franchise tax (minimum $175 under the Authorized Shares Method) by March 1 each year. A Delaware LLC's certificate of formation is $110, and every Delaware LLC owes a $400 annual tax by June 1. Expedited filing costs $50 for 24-hour service or $100 for same-day service.
Related incorporation guides
The full ranking: See our roundup of the best incorporation services for startups, scored on price, speed, and what comes after filing.
Firstbase pricing: Our Firstbase pricing guide itemizes the formation fee and every add-on.
Atlas vs Firstbase: See our Stripe Atlas vs Firstbase breakdown for pricing, add-ons, and who each one suits.
Beyond Stripe Atlas: Browse the best Stripe Atlas alternatives for providers with banking, bookkeeping, or lower fees built in.
Beyond LegalZoom: See the best LegalZoom alternatives by use case.
Ready to incorporate? Rho Incorporation forms Delaware C-corps for $400, and when you incorporate a Delaware C-corp with Rho, your business account opens in the same flow, subject to approval. Rho also forms LLCs for $349 all in, state filing fee included.
