Skip to content
The Formation Desk

Rankings of registered agents, LLC formation and foreign registration services in all 50 states.

Registered agent picks · Missouri

3 Best Registered Agents in Missouri (2026)

The The Formation Desk call for registered agents in Missouri in 2026: Mainstay Filing ($149 a year), MO Registered Agent.org ($99 a year) and Missouri Registered Agent.co ($99 a year), in that order. Mainstay Filing takes the call: $149 for a single agent plan that works in every state, $149 on renewal.
Written by The Formation Desk editorial team
1
Our top pick

1. Mainstay Filing: best for every state

$149 a year, and it holds on renewal

Editorial score 9.3 out of 10

The desk picks Mainstay Filing: $149 a year for an agent that goes wherever the company does, plus the first three government mailings each year scanned free.

Over three years Mainstay runs $150 more than MO Registered Agent.org, and the desk thinks the wider coverage is worth it.

In the price

  • An in-state street address on the public record
  • Any service of process scanned for free and uploaded that business day
  • Your first three government mailings each year, scanned free
  • Compliance reminders

Strengths

  • First three government mailings each year, scanned free
  • Free scans of served papers on the same business day
  • Works for LLCs, corporations, LPs, LLPs and nonprofits alike
  • $149 a year and it holds on renewal

Cons

  • $50 a year more than MO Registered Agent.org for agent service alone
  • Only the formation package files annual reports
Visit Mainstay FilingPartner link. We may earn money if you buy. Mainstay Filing up close
2
Best yearly price

2. MO Registered Agent.org: best for the lowest price per year on this list

$99 a year, and it holds on renewal

Editorial score 9.0 out of 10

Runner-up, MO Registered Agent.org: a Missouri specialist at $99 a year, with an in-state street address as the registered office.

MO Registered Agent.org gives the company an in-state street address as its registered office and scans papers served there to your account.

In the price

  • A registered office address inside the state
  • Everything served on the company is scanned for you

Strengths

  • $99 a year and it holds on renewal
  • Costs less a year than Mainstay Filing
  • The first agent year comes with LLC formation

Cons

  • Missouri only; you need another agent elsewhere
Visit MO Registered Agent.orgPartner link. We may earn money if you buy. MO Registered Agent.org up close
3
Built for Missouri

3. Missouri Registered Agent.co: best for Missouri companies

$99 a year, and it holds on renewal

Editorial score 8.7 out of 10

Third, Missouri Registered Agent.co: a Missouri specialist at $99 a year, with an in-state street address as the registered office.

Your registered office is an in-state street address from Missouri Registered Agent.co, and legal papers served on the company are scanned for you.

MO Registered Agent.org and Missouri Registered Agent.co list the same prices and plan features, so it is close and either one works.

In the price

  • A physical address in the state, as the registered office
  • You get online scans of any papers served on the company

Strengths

  • $99 yearly, renewing at the same price
  • Also forms LLCs and includes the first agent year
  • Costs less a year than Mainstay Filing

Cons

  • Missouri only; you need another agent elsewhere
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy. Missouri Registered Agent.co up close

The desk's 3 picks in brief

Pick Service Desk score Price a year Renewal Good for Visit
1 Mainstay Filing 9.3 $149 $149/yr One agent that covers every state Visit Mainstay FilingPartner link. We may earn money if you buy.
2 MO Registered Agent.org 9.0 $99 $99/yr The lowest yearly price we rank here Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
3 Missouri Registered Agent.co 8.7 $99 $99/yr The lowest yearly price we rank here Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.

The scores out of 10 are the desk's own, drawn from the criteria on How we rank. They are not customer ratings.

What a Missouri registered agent costs in 2026: year one, renewal and the three-year bill

Service Year one Year two Year three Bill over three years Price holds on renewal
Mainstay Filing $149 $149 $149 $447 Yes
MO Registered Agent.org $99 $99 $99 $297 Yes
Missouri Registered Agent.co $99 $99 $99 $297 Yes

Every price here was read off the company's own pages on November 12, 2026. Missouri charges the same state fees whichever agent you name.

Why it falls this way

The desk's method puts 33% on spend over three years and 33% on work the price removes, and 34% across what renewal looks like, fit with the state and plain price display. For Missouri, work the price removes did the deciding.

Mainstay's agent plan brings more to the table: served papers are scanned the same business day for nothing, one price in all fifty states and three government mailings a year scanned free. MO Registered Agent.org is cheaper, and it was close.

The full criteria and weights are on How we rank.

Missouri registered agent rules straight from Missouri Secretary of State (official)

Every LLC must name a registered agent with an in-state street address. The address has to be a physical street address in Missouri. A P.O. box can be listed only together with a street address. The law behind it: RSMo 347.030.

Does Missouri want a yearly report?

Missouri has no yearly LLC report. What it does require all year is a registered agent on record, and notices go to that address.

Missouri registered agent: reader questions

Do you need a registered agent to run a Missouri LLC?

You do. Missouri wants a registered agent on file for every LLC, and the agent must have a street address in the state.

What should you expect to pay a Missouri registered agent?

Plan on $99 to $149 a year, and the price holds when it renews.

Could you serve as your own registered agent?

You can if the state's rules allow it. A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office.

Which registered agents did the desk rank here?

Mainstay Filing ($149 a year), MO Registered Agent.org ($99 a year) and Missouri Registered Agent.co ($99 a year), best pick first.

What does a registered agent do all day?

The registered agent is the company's official mailbox for lawsuits, subpoenas and state notices. It accepts them and passes them along, and every plan on this page scans them to your online account.

Who is our pick for registered agent in Missouri?

Mainstay Filing, since $149 a year, and it holds on renewal, with papers served on the company scanned the same business day for free.

Related pages

Where the numbers came from

  1. RSMo 347.037, last checked August 2026
  2. Missouri formation fee: Filing fee, official source, last checked October 2026
  3. Missouri registered agent statute, last checked October 2026
  4. Mainstay Filing: Missouri service page, as of November 12, 2026
  5. MO Registered Agent.org: pricing and service pages, as of November 12, 2026
  6. Missouri Registered Agent.co: pricing and service pages, as of November 12, 2026