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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 · Colorado · foreign registration

3 Best Foreign Registration Services in Colorado (2026)

Researched and written by the Launchwise Review editorial team
For a 2026 launch in Colorado, Launchwise Review grades foreign registration services this way: CO Registered Agent.org ($199), Colorado Registered Agent.co ($199) and Mainstay Filing ($199). CO Registered Agent.org earns the top grade here: $199 plus the state fee, year-one registered agent service included, then $99 a year for the agent.
1
Our top pick

1. CO Registered Agent.org: best for companies adding only Colorado

$199 for the service and the state fee besides; agent service is $99 a year from the second year

Our mark 9.2 out of 10

Top grade, CO Registered Agent.org: it registers the company in Colorado for $199, first agent year included, then $99 a year.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

On a three-year bill it comes in under Mainstay Filing, and that is a heavily weighted criterion for us.

In the price

  • Filing with the state
  • The first year of registered agent service

Pros

  • Registers the company for $199, state fee extra
  • Covers the first year of registered agent service
  • Keeps your agent for $99 yearly

Less good

  • Colorado only; the home state needs its own agent
  • EIN application costs extra ($99)
Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
Read the CO Registered Agent.org launch review
2
Best local option

2. Colorado Registered Agent.co: best for Colorado registrations only

Service $199, state fee extra; the agent then costs $99 each year

Our mark 8.9 out of 10

Next up is Colorado Registered Agent.co: it registers the company in Colorado for $199, first agent year included, then $99 a year.

You get an in-state street address for the registered office, and any papers served on the company are scanned into your online account.

Colorado Registered Agent.co copies CO Registered Agent.org on price and features, so the pair is close to level.

In the price

  • Filing with the state
  • The first year of registered agent service

Pros

  • Then $99 a year to keep the agent
  • Covers the first year of registered agent service
  • $199 to register, plus the state fee

Less good

  • Colorado only; the home state needs its own agent
  • EIN application costs extra ($99)
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Read the Colorado Registered Agent.co launch review
3
One price, any state

3. Mainstay Filing: best for founders working in several states

Service $199, state fee extra ($299 at checkout); the agent then costs $149 each year

Our mark 8.6 out of 10

Rounding out the list is Mainstay Filing: $199 on top of the state fee, a free first year as registered agent and the same price in any state.

When the free year is over, expect $149 a year for the agent anywhere.

CO Registered Agent.org is $100 lower across three years, which puts Mainstay Filing behind it on cost.

In the price

  • Your foreign registration, handled
  • Your registered agent free for the first year
  • No-cost scanning of served papers within the same business day

Pros

  • Papers served on the company are scanned the same business day, free
  • One price in every state
  • Registered agent service is free the first year
  • $199 for the service, with the state fee added

Less good

  • The agent costs $149 a year after year one, $50 above CO Registered Agent.org
Visit Mainstay FilingPartner link. We may earn money if you buy.
Read the Mainstay Filing launch review

The 3 grades at a glance

Place Company Launch grade Service price Second year Best fit Go
1 CO Registered Agent.org 9.2 $199 $99/yr The lowest agent renewal on this page Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
2 Colorado Registered Agent.co 8.9 $199 $99/yr The lowest agent renewal on this page Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
3 Mainstay Filing 8.6 $199 $149/yr Founders opening a second state Visit Mainstay FilingPartner link. We may earn money if you buy.
The 10-point grades are editorial, built from the criteria on How we rank. They are not customer ratings.

Colorado foreign registration service cost in 2026: first year, renewals, three-year total

Company Year 1 Year 2 Year 3 Three years, total Agent covered, year one
CO Registered Agent.org $199 $99 $99 $397 Included
Colorado Registered Agent.co $199 $99 $99 $397 Included
Mainstay Filing $199 $149 $149 $497 Free
Prices were copied from each company's own pages on November 12, 2026. Add Colorado's $100 registration fee to any row; it is not in the totals.

Why this order

What made the call in Colorado was cost to launch and stay. The grading method sets cost to launch and stay at 26%, launch paperwork handled at 26% and renewal behavior, state match and price transparency at 48% combined.

CO Registered Agent.org comes to $397 over three years, $100 under Mainstay Filing. Both include year one, so the renewal price broke the tie.

Every criterion and weight is listed on How we rank.

Opening in Colorado as a foreign LLC: fee, form and office

Your registration goes to the Colorado Secretary of State, Business Program, on the Statement of Foreign Entity Authority. Budget $100 for the state.

Calendar item for later: the periodic report at $25, due once a year, by the end of the second month after your report month.

Before you file, get these together

  • Your company's exact legal name and the date it was formed at home.
  • A registered agent with a street address in the state; every company graded on this page can serve.
  • The $100 state fee, ready to pay with the filing.
  • A calendar reminder for the periodic report and its $25 fee.

What skipping Colorado registration can cost you

Fines can climb to $5,000.

Quick answers about Colorado foreign registration services

When does an LLC from elsewhere have to register in Colorado?

Once it does business there.

What should I budget to bring an existing LLC into Colorado?

The state fee is $100; add a service fee of $199.

Does the foreign LLC still need a registered agent?

Yes. Keep a registered agent with a street address in the state for as long as the company is registered there.

Which foreign registration services are graded on this page?

CO Registered Agent.org ($199), Colorado Registered Agent.co ($199) and Mainstay Filing ($199), top grade first.

What recurring filing follows a foreign registration?

Add the periodic report ($25) to your yearly calendar.

Which service is the best way to register a foreign LLC in Colorado?

CO Registered Agent.org, because $199 beyond the state fee gets the company into Colorado, with the agent renewing at $99.

Keep reading

Sources and dates

  1. Colorado Secretary of State, dated August 2026
  2. Colorado Secretary of State, dated August 2026
  3. Colorado yearly filing: Periodic report, official source, dated October 2026
  4. Colorado report due date, dated August 2026
  5. Colo. Rev. Stat. § 7-80-203, dated August 2026
  6. Colorado formation fee: Filing fee, official source, dated October 2026
  7. Colorado Secretary of State, foreign entity FAQ, dated October 2026
  8. Sample Statement of Foreign Entity Authority, dated October 2026
  9. Colorado Revised Statutes 2024, Title 7, dated October 2026
  10. Registered agent requirements effective July 1, 2025, dated October 2026
  11. From CO Registered Agent.org: pricing and service pages, copied November 12, 2026
  12. From Colorado Registered Agent.co: pricing and service pages, copied November 12, 2026
  13. From Mainstay Filing: Colorado service page, copied November 12, 2026