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Comparison · checked November 15, 2026

Firstbase vs Corpus

Firstbase forms LLCs and C corporations in Delaware or Wyoming. Its Start package is $99 plus the state fee, and its pricing page says registered agent service is required for incorporation, at $299 per state per year; founders without a US address also need its Mailroom, from $315 a year. Corpus forms LLCs in all 50 states and DC, with one itemized total per state that includes year one of registered agent, then $99 a year with no automatic charge.

We are a competitor, so every Firstbase figure below links the Firstbase page it came from, and the page says where Firstbase may be the better pick.

At a glance

FirstbaseCorpus
Formation priceStart is $99 one-time, shown against a struck-through $399, plus the state fee; the pricing page does not give the fee amount sourceState fees + Corpus service fee, itemized per state before you pay
States and entitiesLLC or C corporation, formed in Delaware or Wyoming only; foreign qualification in other states afterwards Pricing Which statesLLCs in all 50 states and DC; nonprofit corporations in most states
Registered agentRequired for incorporation: Agent Autopilot at $299 per state per year. Older help articles say from $149 a year Pricing Other feesYear 1 included in the total; renews at $99/yr
Registered agent renewalRenews automatically at the then-current rate, billed yearly in advance; stopping it takes proof of a new agent and notice before renewal. Fees are not refunded sourceNo automatic charge. Corpus reminds you before renewal and you choose whether to renew
US addressRequired for incorporation. Mailroom ($35 a month or $315 a year) is required if you have no US address Pricing MailroomWyoming and Delaware accept a principal office abroad; Maryland and New York need one in the state; other states need a US street address
EINExpedited EIN setup is included. Without an SSN or ITIN, its help centre says about 20 to 30 business days Pricing EIN without SSN or ITINOptional add-on, priced separately, when available
Processing (Firstbase's estimate)Wyoming about 3 to 7 business days; Delaware about 25 business days, or $100 to expedite Timing Expedited filingFiled after review; state times are on each state's page
RefundsWithin 7 days of purchase: a full refund before documents go to the state, 50% after registration but before the EIN application; otherwise none sourceFull refund before Corpus begins processing your filing
AI agentsNo public API or MCP server found. The footer's Incorporation API link returned a 404 page when Corpus checked sourcePublic MCP server, no account needed to start: an assistant collects your answers and hands you a prefilled link to review and pay

What Firstbase charges

  • Start: $99 one-time ($399 struck through) plus the state fee, with expedited EIN setup, essential documents and a bank-account application through partners. source
  • Registered agent (Agent Autopilot): $299 per state per year, required for incorporation. source
  • Mailroom: Basic $35 a month or $315 a year; Premium $50 a month or $350 a year. Required if you have no US address. Pricing Mailroom
  • Delaware expedited filing: $100. source
  • Firstbase One: $199 a month, billed yearly at $2,388, for accounting, Mailroom Premium, registered agent in one state and tax filing. It does not include formation. Pricing Firstbase One

What renews, and how to stop it

  • Registered agent renews automatically at the then-current rates and is billed yearly in advance (Agent terms §1.4, §3.2). source
  • To stop it, the Agent terms ask for proof that you changed registered agent and notice at least 10 business days before renewal; §4.1 of the same terms says 30 days. source
  • Agent fees are non-refundable, with no credit for part of a term. source
  • Mailroom renews the same way, billed monthly in advance unless the ordering page says otherwise, with the same notice terms. source

First year in Wyoming

  • Start is $99 and Agent Autopilot is $299 for Wyoming; the pricing page says both are needed to incorporate. source
  • A founder without a US address also needs Mailroom, from $315 a year. Pricing Mailroom
  • Firstbase At least $498 (Start at $99 plus the required first year of registered agent at $299 plus Wyoming's $100 filing fee, before any online processing fee). state fee source
  • Corpus $293 all-in, itemized: Wyoming's state fees, the first year of registered agent and the Corpus service fee. Wyoming page

Firstbase's $398 is Start plus its required first year of registered agent, before the state fee; it includes EIN setup, which the Corpus total does not. Corpus's total includes the state fee and year one of registered agent, which then renews at $99/yr; Firstbase's renews at its then-current rate, $299 on its pricing page today.

Registered agent, years 2 to 5

Every LLC needs a registered agent for as long as it exists in most states, so the renewal price is the number that adds up. At each provider’s listed annual price:

  • Firstbase $1,196 at $299/yr for Agent Autopilot, the plan on its pricing page today (year 1 is $299, required with formation)
  • Corpus $396 at $99/yr (year 1 is included in the formation total)

Where Firstbase may suit you better

  • You need a C corporation. Firstbase forms LLCs and C corporations; Corpus forms LLCs and nonprofits. source
  • You live outside the US and want a US mailing address, EIN setup and tax filing from one company. Mailroom, the included EIN setup and an $899-a-year tax filing tier for non-US-owned single-member LLCs cover them. source
  • You want accounting, tax filing, registered agent and a mailbox on one bill. Firstbase One bundles them for $2,388 a year. source

How Corpus prices the same thing

State fees + Corpus service fee. Choose your state to see the current state fees and Corpus service fee before purchase. Registered-agent service for year 1 is included in your total. EIN filing is optional and priced separately, when available. Registered agent renews at a flat $99/yr after your included first year. We remind you before it's due; you're never charged automatically.

Each state’s itemized Corpus price is on the price grid and its own state page. All 19 LLC services side by side, scored by one rubric with Corpus’s own gaps included, are on the full comparison.

Corpus also searches federal, state and city law. How that compares with Municode, Justia and the other law databases is on legal code databases compared.

Check it yourself

These are Firstbase’s own pages. Read them rather than trusting our summary of them.

Your next step

See your state’s Corpus price

Corpus shows the state fees, the Corpus service fee, what is included and what renews before you enter payment information.

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Prices, offers and terms change. This page records what Firstbase’s pages said on November 15, 2026; review its current terms before purchasing.

Firstbase is not affiliated with Corpus. Its name is used to identify the pages described. Corpus is not a law firm and does not provide legal advice.