> For AI agents: read the machine-readable documentation index at [https://corpuslaw.us/llms.txt](https://corpuslaw.us/llms.txt) or the single-file full reference at [https://corpuslaw.us/llms-full.txt](https://corpuslaw.us/llms-full.txt).

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.

## At a glance

| | Firstbase | Corpus |
|---|---|---|
| Formation price | Start is $99 one-time, shown against a struck-through $399, plus the state fee; the pricing page does not give the fee amount ([source](https://www.firstbase.io/pricing)) | State fees + Corpus service fee, itemized per state before you pay |
| States and entities | LLC or C corporation, formed in Delaware or Wyoming only; foreign qualification in other states afterwards ([Pricing](https://www.firstbase.io/pricing), [Which states](https://help.firstbase.io/hc/en-us/articles/360056689472)) | LLCs in all 50 states and DC; nonprofit corporations in most states |
| Registered agent | Required for incorporation: Agent Autopilot at $299 per state per year. Older help articles say from $149 a year ([Pricing](https://www.firstbase.io/pricing), [Other fees](https://help.firstbase.io/hc/en-us/articles/360057450791)) | Year 1 included in the total; renews at $99/yr |
| Registered agent renewal | Renews 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 ([source](https://www.firstbase.io/terms)) | No automatic charge. Corpus reminds you before renewal and you choose whether to renew |
| US address | Required for incorporation. Mailroom ($35 a month or $315 a year) is required if you have no US address ([Pricing](https://www.firstbase.io/pricing), [Mailroom](https://help.firstbase.io/hc/en-us/articles/5021178936468)) | Wyoming and Delaware accept a principal office abroad; Maryland and New York need one in the state; other states need a US street address |
| EIN | Expedited EIN setup is included. Without an SSN or ITIN, its help centre says about 20 to 30 business days ([Pricing](https://www.firstbase.io/pricing), [EIN without SSN or ITIN](https://help.firstbase.io/hc/en-us/articles/360061657371)) | Optional 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](https://help.firstbase.io/hc/en-us/articles/360057435771), [Expedited filing](https://help.firstbase.io/hc/en-us/articles/360057224452)) | Filed after review; state times are on each state's page |
| Refunds | Within 7 days of purchase: a full refund before documents go to the state, 50% after registration but before the EIN application; otherwise none ([source](https://www.firstbase.io/terms)) | Full refund before Corpus begins processing your filing |
| AI agents | No public API or MCP server found. The footer's Incorporation API link returned a 404 page when Corpus checked ([source](https://www.firstbase.io/api)) | Public 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](https://www.firstbase.io/pricing))
- Registered agent (Agent Autopilot): $299 per state per year, required for incorporation. ([source](https://www.firstbase.io/pricing))
- 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](https://www.firstbase.io/pricing), [Mailroom](https://help.firstbase.io/hc/en-us/articles/5021178936468))
- Delaware expedited filing: $100. ([source](https://help.firstbase.io/hc/en-us/articles/360057224452))
- 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](https://www.firstbase.io/pricing), [Firstbase One](https://www.firstbase.io/platform))

## 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](https://www.firstbase.io/terms))
- 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](https://www.firstbase.io/terms))
- Agent fees are non-refundable, with no credit for part of a term. ([source](https://www.firstbase.io/terms))
- Mailroom renews the same way, billed monthly in advance unless the ordering page says otherwise, with the same notice terms. ([source](https://www.firstbase.io/terms))

## First year in Wyoming

- Start is $99 and Agent Autopilot is $299 for Wyoming; the pricing page says both are needed to incorporate. ([source](https://www.firstbase.io/pricing))
- A founder without a US address also needs Mailroom, from $315 a year. ([Pricing](https://www.firstbase.io/pricing), [Mailroom](https://help.firstbase.io/hc/en-us/articles/5021178936468))
- 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](https://sos.wyo.gov/Forms/Business/LLC/LLC-ArticlesOrganization.pdf))
- Corpus: $293 all-in, itemized: Wyoming's state fees, the first year of registered agent and the Corpus service fee. (https://corpuslaw.us/form-an-llc/wyoming)

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

- 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](https://www.firstbase.io/start-with-firstbase))
- 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](https://www.firstbase.io/pricing))
- You want accounting, tax filing, registered agent and a mailbox on one bill. Firstbase One bundles them for $2,388 a year. ([source](https://www.firstbase.io/platform))

## 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.

Every state's itemized Corpus price: https://corpuslaw.us/formation/pricing. All 19 LLC services compared: https://corpuslaw.us/compare/llc-services.

## Check it yourself

- [Firstbase: Pricing](https://www.firstbase.io/pricing), read by Corpus on November 15, 2026.
- [Firstbase: Terms (Terms of Use, Agent and Mailroom tabs)](https://www.firstbase.io/terms), read by Corpus on November 15, 2026.
- [Firstbase: Start](https://www.firstbase.io/start-with-firstbase), read by Corpus on November 15, 2026.
- [Firstbase: Firstbase One](https://www.firstbase.io/platform), read by Corpus on November 15, 2026.
- [Firstbase: Incorporation API link (404)](https://www.firstbase.io/api), read by Corpus on November 15, 2026.
- [Firstbase help: Which states](https://help.firstbase.io/hc/en-us/articles/360056689472), read by Corpus on November 15, 2026.
- [Firstbase help: Other fees](https://help.firstbase.io/hc/en-us/articles/360057450791), read by Corpus on November 15, 2026.
- [Firstbase help: Mailroom](https://help.firstbase.io/hc/en-us/articles/5021178936468), read by Corpus on November 15, 2026.
- [Firstbase help: EIN without SSN or ITIN](https://help.firstbase.io/hc/en-us/articles/360061657371), read by Corpus on November 15, 2026.
- [Firstbase help: Timing](https://help.firstbase.io/hc/en-us/articles/360057435771), read by Corpus on November 15, 2026.
- [Firstbase help: Expedited filing](https://help.firstbase.io/hc/en-us/articles/360057224452), read by Corpus on November 15, 2026.

Prices and terms change. This page records what Firstbase's pages said on November 15, 2026; check its current terms before you buy. 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.