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Filing Verdict

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

Registered agent verdict · Colorado

3 Best Registered Agents in Colorado (2026)

Filing Verdict's 2026 verdict on registered agents in Colorado: CO Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Colorado Registered Agent.co ($99 a year), in that order. CO Registered Agent.org takes first place: a Colorado specialist at $99 a year, with an in-state street address for the registered office.
The Filing Verdict editorial team
Number one here
Spot 1

1. CO Registered Agent.org: best for the lowest yearly fee on this list

$99 per year, flat

9.3Editorial score
out of 10

CO Registered Agent.org wins here: $99 a year, flat, with served legal papers scanned and sent to you online.

CO Registered Agent.org lists its in-state street address as the company's registered office and posts scans of served papers to your online account.

The three-year total beats Mainstay Filing's, and that cost advantage carries real weight in our method.

What you get

  • A registered office address inside the state
  • Papers served on the company are scanned and posted to your online account

What we like

  • Also forms LLCs, with year-one agent service included
  • Undercuts Mainstay Filing each year
  • A $99 yearly plan that holds its price

Cons

  • The periodic report filing is yours to handle
  • Built for Colorado; other states need a separate agent
Visit CO Registered Agent.orgPartner link. We may earn money if you buy. Our full CO Registered Agent.org verdict
One agent, every state
Spot 2

2. Mainstay Filing: best for all fifty states

$149 per year, flat

8.9Editorial score
out of 10

Second place goes to Mainstay Filing: $149 a year whether the company stays put or expands, and the first three government mailings each year are scanned free.

New company? Mainstay's formation package at $199 a year adds the Colorado filing and the periodic report.

Over three years CO Registered Agent.org is $150 cheaper, which puts Mainstay Filing behind it on cost.

What you get

  • A registered office address in any state you need
  • Papers served on the company scanned and uploaded the same business day, free
  • Three government mailings a year scanned at no charge
  • Compliance reminders

What we like

  • Same-business-day scans of served papers, free
  • Serves LLCs, corporations, LPs, LLPs and nonprofits
  • $149 a year, unchanged at renewal
  • Three government mailings a year scanned free

Cons

  • The agent alone runs $50 a year above CO Registered Agent.org
  • Annual reports are not filed on the agent-only plan
Visit Mainstay FilingPartner link. We may earn money if you buy. Our full Mainstay Filing verdict
Built for Colorado
Spot 3

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

$99 per year, flat

8.7Editorial score
out of 10

Third place goes to Colorado Registered Agent.co: $99 a year, flat, with served legal papers scanned and sent to you online.

Colorado Registered Agent.co supplies the registered office street address and scans served legal papers into your account.

CO Registered Agent.org and Colorado Registered Agent.co publish identical prices and plan features, so little separates them; either is a safe pick.

What you get

  • A physical in-state address for the registered office
  • Legal papers delivered to the company arrive in your account as scans

What we like

  • Beats Mainstay Filing on yearly price
  • $99 per year, renewing at the same price
  • LLC formation available, first agent year free

Cons

  • The periodic report filing is yours to handle
  • Built for Colorado; other states need a separate agent
Visit Colorado Registered Agent.coPartner link. We may earn money if you buy. Our full Colorado Registered Agent.co verdict

The 3 verdicts at a glance

No.ServiceVerdict scoreYearly priceRenewalBest forVisit
1CO Registered Agent.org9.3$99$99/yrThe lowest yearly price we rank here Visit CO Registered Agent.orgPartner link. We may earn money if you buy.
2Mainstay Filing8.9$149$149/yrAn agent that works in all fifty states Visit Mainstay FilingPartner link. We may earn money if you buy.
3Colorado Registered Agent.co8.7$99$99/yrThe lowest yearly price we rank here Visit Colorado Registered Agent.coPartner link. We may earn money if you buy.
Every score here is Filing Verdict's own editorial mark out of 10, set from the criteria on How we rank. No customer ratings are involved.

Colorado registered agent prices for 2026: year one, renewals and three years

ServiceYear 1Year 2Year 3Total, 3 yearsRenewal price unchanged
CO Registered Agent.org$99$99$99$297Yes
Mainstay Filing$149$149$149$447Yes
Colorado Registered Agent.co$99$99$99$297Yes
Prices were read from each company's own pages on November 12, 2026. Colorado's fees do not depend on which agent you choose.

How the order was set

The method behind this ranking weighs total over three years at 35% and paperwork the price handles at 35%, with renewal behavior, match to the state and up-front pricing sharing the remaining 30%. For Colorado, total over three years decided the order.

CO Registered Agent.org totals $297 over three years, $150 under Mainstay Filing. A company that needs an agent in Colorado only gains little from fifty-state coverage, so the lower yearly price decided it.

The full list of criteria and weights is on How we rank.

Colorado registered agent requirements, from Colorado Secretary of State (official)

Every LLC must name a registered agent with an in-state street address. The address has to be a physical address in Colorado, either a home or a usual place of business. P.O. boxes are not accepted. Citation: C.R.S. § 7-90-701.

Colorado periodic report: what it costs and when it is due

Every Colorado LLC owes the periodic report every year. The state fee is $25, due last day of the entity's anniversary month. A late filing adds $50. Notices about it go to your registered agent.

Colorado registered agent: questions answered

Must a Colorado LLC have a registered agent?

Yes. Colorado requires every LLC to keep a registered agent on file, and the agent needs a street address in the state.

What do Colorado registered agents charge each year?

The prices run $99 to $149 a year, and every service keeps its price at renewal.

May I act as my own registered agent?

Only if you meet the state's conditions. A person 18 or older whose home or usual place of business is in Colorado (since July 1, 2025 the person has to hold a Colorado driver's license or ID or otherwise verify residency), or a business entity in good standing with a usual place of business in Colorado. The agent has to consent.

What is the due date for the Colorado periodic report?

Due last day of the entity's anniversary month; the state fee is $25. Filing late adds $50.

Which registered agents are ranked on this page?

CO Registered Agent.org ($99 a year), Mainstay Filing ($149 a year) and Colorado Registered Agent.co ($99 a year), from first place to last.

Which registered agent is the best value in Colorado?

CO Registered Agent.org, because $99 a year, unchanged at renewal, and the lowest yearly price on this list.

Read next

Sources and dates

  1. Colorado Secretary of State, confirmed August 2026
  2. Colorado Secretary of State, confirmed August 2026
  3. Colorado yearly filing: Periodic report, official source, confirmed October 2026
  4. Colorado report due date, confirmed August 2026
  5. Colo. Rev. Stat. § 7-80-203, confirmed August 2026
  6. Colorado formation fee: Filing fee, official source, confirmed October 2026
  7. Checked November 12, 2026: CO Registered Agent.org, pricing and service pages
  8. Checked November 12, 2026: Mainstay Filing, Colorado service page
  9. Checked November 12, 2026: Colorado Registered Agent.co, pricing and service pages