Skip to content
File your LLC paperwork with confidence.
For all 50 states

3 Best Registered Agents (2026), Ranked for You

Our 2026 national order for registered agents is Mainstay Filing ($149 a year), KY Registered Agent.org ($99 a year) and Idaho Registered Agent.co ($99 a year), best first. The first recommendation is Mainstay Filing: $149 a year works in any state, so a growing LLC keeps a single agent.
Written by the Simple Filing Guide editorial team

Summary

Best first step
Mainstay Filing
Kentucky companies
KY Registered Agent.org
Idaho companies
Idaho Registered Agent.co
Another state
See what applies to you

Our three recommendations

Our ranking method explains the order.

#1 Recommended first

1. Mainstay Filing: best for a company that may grow

Pay $149 now and $149 each year after

Why Mainstay Filing first? Because $149 a year works in any state, so a growing LLC keeps a single agent.

Compare the price before you commit: KY Registered Agent.org is $150 lower over three years, but it works only in Kentucky.

Checklist: what is included
  • Street address in any state
  • Three government mailings a year scanned free
  • Covers LLCs, corporations, LPs, LLPs and nonprofits
What works
  • One price, $149, nationwide
  • Expect no price change at renewal
Gaps
  • Not the lowest bill if you stay in one state
Start with Mainstay Filing Partner link. We may earn money if you buy.
#2 Kentucky option

2. KY Registered Agent.org: best for Kentucky businesses

Pay $99 now and $99 each year after

In second place, KY Registered Agent.org, where its flat $99 a year is aimed at LLCs that stay in Kentucky.

It covers Kentucky only, so choose it when the company will never file in another state.

Checklist: what is included
  • Kentucky office address
  • Legal papers scanned online
What works
  • Smaller first bill than Mainstay Filing
  • Expect no price change at renewal
Gaps
  • Single state, Kentucky
  • Remember to file the report yourself
Start with KY Registered Agent.org Partner link. We may earn money if you buy.
#3 Idaho option

3. Idaho Registered Agent.co: best for Idaho businesses

Pay $99 now and $99 each year after

Last, consider Idaho Registered Agent.co: its flat $99 a year is aimed at LLCs that stay in Idaho.

It covers Idaho only, so choose it when the company will never file in another state.

Checklist: what is included
  • Idaho office address
  • Legal papers scanned online
What works
  • Smaller first bill than Mainstay Filing
  • Expect no price change at renewal
Gaps
  • Single state, Idaho
  • Remember to file the report yourself
Start with Idaho Registered Agent.co Partner link. We may earn money if you buy.

Price and reach table

#CompanyYear-one costYearly afterTotal for 3 yearsStates covered
1 Mainstay Filing $149$149/yr$447Every state Start with Mainstay Filing Partner link. We may earn money if you buy.
2 KY Registered Agent.org $99$99/yr$297Kentucky Start with KY Registered Agent.org Partner link. We may earn money if you buy.
3 Idaho Registered Agent.co $99$99/yr$297Idaho Start with Idaho Registered Agent.co Partner link. We may earn money if you buy.

Company prices from November 13, 2026, before any state fee.

What readers ask

Can I use one service as my LLC grows?

Mainstay Filing is the one. It charges the same everywhere, and picks two and three work in a single state.

If your company expands, you will not need to switch services.

Why are one-state services on the list?

When every filing is in one state, check whether a local plan comes in lower. KY Registered Agent.org is best for Kentucky businesses; Idaho Registered Agent.co for Idaho businesses.

How did you decide the order?

Because a reader could live anywhere, the service that covers every state goes first.

Most of the score comes from total for three years and filing jobs included. Our method in full

FAQ

Which registered agent should I start with in 2026?

Our ranking is Mainstay Filing, KY Registered Agent.org and Idaho Registered Agent.co.

What should I budget for a registered agent?

The picks charge between $99 and $149 annually.

What is each pick's three-year total?

Totals to compare: Mainstay Filing at $447, KY Registered Agent.org at $297, Idaho Registered Agent.co at $297.

How do I look up my state?

Use the state list. Each guide cites its own fees and rules.

How current are the prices?

From each company's pricing page, read November 13, 2026.

References

  1. pricing page from Mainstay Filing, checked November 13, 2026
  2. pricing page from KY Registered Agent.org, checked November 13, 2026
  3. pricing page from Idaho Registered Agent.co, checked November 13, 2026