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Researched and written by the Launchwise Review editorial team
Launchwise Review

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

Launch guide · Missouri · registered agent

3 Best Registered Agents in Missouri (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Missouri, Launchwise Review grades registered agents this way: Mainstay Filing ($149 a year), MO Registered Agent.org ($99 a year) and Missouri Registered Agent.co ($99 a year). Mainstay Filing earns the top grade here: one agent plan at $149 a year that works in every state, renewing at $149.
1
Number one here

1. Mainstay Filing: best for all fifty states

$149 a year, flat

Our mark 9.1 out of 10

Top grade, Mainstay Filing: the price stays $149 a year if you stay put or expand, and your first three government letters each year are scanned free.

It runs $150 above MO Registered Agent.org across three years; the extra paperwork it handles is worth that to us.

In the price

  • A registered office street address in any state you need
  • Free scan of served papers the same business day they arrive
  • Your first three government letters each year, scanned free
  • Compliance reminders

Pros

  • Your first three government letters each year are scanned free
  • Papers served on the company are scanned the same business day, free
  • Works for LLCs, corporations, LPs, LLPs and nonprofits
  • $149 a year and it does not rise

Less good

  • The agent plan alone costs $50 a year more than MO Registered Agent.org
  • Report filing belongs to the formation package, not the agent plan
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review
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Best local option

2. MO Registered Agent.org: best for the smallest annual bill we rank here

$99 a year, flat

Our mark 8.9 out of 10

Next up is MO Registered Agent.org: a Missouri specialist at $99 a year, supplying an in-state street address for the registered office.

MO Registered Agent.org gives the company an in-state street address as its registered office, and each legal paper served there is scanned into your account.

In the price

  • An in-state street address as the registered office
  • Scans of legal papers served on the company wait in your account

Pros

  • $99 a year, and it does not change at renewal
  • A lower yearly price than Mainstay Filing
  • Can form your LLC and cover the first agent year

Less good

  • Made for Missouri; other states need their own agent
Visit MO Registered Agent.orgPartner link. We may earn money if you buy.
Read the MO Registered Agent.org launch review
3
Missouri specialist

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

$99 a year, flat

Our mark 8.7 out of 10

Rounding out the list is Missouri Registered Agent.co: a Missouri specialist at $99 a year, supplying an in-state street address for the registered office.

Your registered office becomes Missouri Registered Agent.co's street address in the state, and you read anything served on the company as a scan online.

MO Registered Agent.org and Missouri Registered Agent.co post the same price and the same features, so you can choose either.

In the price

  • The in-state address the state asks for
  • Whatever is served on the company is scanned into your account

Pros

  • LLC formation with year-one agent service included
  • $99 yearly, held steady at renewal
  • A lower yearly price than Mainstay Filing

Less good

  • Made for Missouri; other states need their own agent
Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
Read the Missouri Registered Agent.co launch review

The 3 grades at a glance

Place Company Launch grade Per year At renewal Best fit Go
1 Mainstay Filing 9.1 $149 $149/yr An agent for every state you may enter Visit Mainstay FilingPartner link. We may earn money if you buy.
2 MO Registered Agent.org 8.9 $99 $99/yr The lowest yearly price among the picks 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 among the picks we rank here Visit Missouri Registered Agent.coPartner link. We may earn money if you buy.
Scores out of 10 are Launchwise Review's own editorial grades, set from the criteria on How we rank. Customers do not rate anything here.

Missouri registered agent cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Renewal price matches
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
Prices were copied from each company's own pages on November 12, 2026. Missouri's own fees do not change with your choice of agent.

What drove the grades

Two criteria weigh 26% each in these grades: cost to launch and stay and launch paperwork handled. Renewal behavior, state match and price transparency share 48%, and Missouri turned on launch paperwork handled.

Mainstay's plan covers more ground: papers served on the company are scanned the same business day at no charge, the price is the same in all fifty states, and three government letters a year are scanned free. MO Registered Agent.org costs less, and the grades are close.

Every criterion and weight is listed on How we rank.

Missouri registered agent rules, straight from Missouri Secretary of State

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. Law behind it: RSMo 347.030.

What is left to do in Missouri once an agent is named

There is no yearly LLC report in Missouri. The one standing task is to keep a registered agent on file, since the state mails its notices there.

Quick answers about Missouri registered agents

Do I have to line up a registered agent before launching a Missouri LLC?

Yes. Put a registered agent with a physical Missouri address on the paperwork, because the state will not accept an LLC without one.

What should I budget each year for a Missouri registered agent?

Expect $99 to $149 a year, and each company keeps its price at renewal.

Could I just serve as my own registered agent?

Often yes, if you meet the state's conditions. A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office.

Which registered agents are graded on this page?

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

What does a registered agent handle?

Think of the registered agent as the company's mailing address for the state and the courts: lawsuits, subpoenas and official notices land there first. The agent passes them to you, and every plan on this page uploads scans to your account.

Which Missouri registered agent should a new company pick first?

Mainstay Filing, because $149 a year, still $149 at renewal, and papers served on the company are scanned the same business day at no charge.

See also

Sources and dates

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