LLC Review Desk's 2026 picks for registered agents in Missouri, favorite first, are Mainstay Filing ($149 a year), Missouri Registered Agent.co ($99 a year) and MO Registered Agent.org ($99 a year). Mainstay Filing is our favorite, because it's $149 a year and the price doesn't climb at renewal, plus papers served on the company get scanned the same business day for free.
By the LLC Review Desk editorial team
Position 1
Our top pick in Missouri
1. Mainstay Filing: best for all fifty states
$149 a year, the same each year
Our score
9.5out of 10
9.5 out of 10
Our favorite is Mainstay Filing, because one plan, $149 a year, follows the company to any state and renews at $149.
Over three years it costs $150 more than Missouri Registered Agent.co, and for us the extra things it handles are worth that.
In the price
A registered office street address wherever you need one
No-charge scans of served papers on the day they arrive
Free scans of your first three government letters each year
Compliance reminders
What we like
$149 a year and it stays flat
Same-business-day scans of papers served on the company, no charge
Your first three government letters each year, scanned for free
Fine for LLCs, corporations, LPs, LLPs and nonprofits
Trade-offs
The agent plan alone is $50 a year more than Missouri Registered Agent.co
Report filing comes with the formation package, not the agent plan
2. Missouri Registered Agent.co: best for the smallest yearly price on this list
$99 a year, the same each year
Our score
9.1out of 10
9.1 out of 10
Coming in second is Missouri Registered Agent.co, because you pay a flat $99 a year, and papers served on the company are scanned into your account.
The registered office you get is Missouri Registered Agent.co's address inside the state, and you read whatever is served on the company as a scan online.
In the price
A street address in the state for your registered office
Every legal paper served on the company is scanned and stored in your account
What we like
A lower yearly price than Mainstay Filing
$99 yearly, no change at renewal
LLC formation with year-one agent service included
Trade-offs
Built for Missouri; other states need another agent
3. MO Registered Agent.org: best for Missouri specialists
$99 a year, the same each year
Our score
8.9out of 10
8.9 out of 10
In third place is MO Registered Agent.org, because you pay a flat $99 a year, and papers served on the company are scanned into your account.
MO Registered Agent.org lends your company a street address in the state for its registered office, and papers served on the company are scanned into your account.
MO Registered Agent.org mirrors Missouri Registered Agent.co on price and features, so the two are very close.
In the price
A state street address listed as your registered office
Every legal paper served on the company is scanned and stored in your account
What we like
$99 a year, and it stays the same at renewal
A lower yearly price than Mainstay Filing
Can form your LLC and cover the first agent year
Trade-offs
Built for Missouri; other states need another agent
The 10-point scores are ours. They come from the criteria on How we rank and don't use customer ratings.
What Missouri registered agents cost in 2026: year one, renewals and three years
Service
First year
Second year
Third year
Three-year total
Same price when you renew
Mainstay Filing
$149
$149
$149
$447
Yes
Missouri Registered Agent.co
$99
$99
$99
$297
Yes
MO Registered Agent.org
$99
$99
$99
$297
Yes
We took each price from the company's own pages on November 12, 2026. Missouri's own fees stay the same no matter which agent you choose.
How we scored these
In Missouri, filings in the price decided the order. If you're curious about the weights, three-year cost is 29%, filings in the price is 29% and renewal price, state fit and up-front totals share 42%.
Mainstay's plan does more: it scans papers served on the company the same business day, free, and the price is the same in all fifty states, with three government letters a year scanned at no charge. Missouri Registered Agent.co costs less, so it's a close race.
You can read every criterion and weight on How we rank.
What Missouri says about the registered agent (via 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. The law: RSMo 347.030.
What you still do in Missouri once you have an agent
Good news: Missouri has no yearly LLC report. The one ongoing job is keeping a registered agent on file, since the state sends its notices there.
Your questions about Missouri registered agents
Do I really need a registered agent for a Missouri LLC?
You do. Missouri won't accept an LLC without a registered agent who has a street address in the state, and that name goes on the public record.
What do Missouri registered agents usually cost per year?
Plan on $99 to $149 a year, and each service keeps its price when you renew.
Can I be my own registered agent?
Sometimes, if you meet the state's rules. A Missouri resident, or a corporation authorized in Missouri, whose business office is the registered office.
Which registered agents did we review here?
Mainstay Filing ($149 a year), Missouri Registered Agent.co ($99 a year) and MO Registered Agent.org ($99 a year), with our favorite first.
What does a registered agent do, exactly?
Think of the registered agent as the place the court and the state send things: lawsuits, subpoenas and official notices. The agent gets them and hands them over to you, and every plan on this page puts scans in your online account.
Who is the best registered agent for Missouri?
Mainstay Filing, because you pay $149 a year whether you stay in one state or grow, and your first three government letters each year are scanned free.