All 50 states
3 Best Foreign Registration Services (2026): Price Index
Index basis: Value index, nationwide reach first
The national price ledger
1. Mainstay Filing: best for a price that never changes by state
Leads the indexFor the whole country, Mainstay Filing is the best value: $199 above each state's fee, then $149 a year for the agent.
In Kentucky, Kentucky Registered Agent.co subtotals $100 less over three years, but its price stops at the state line.
Line includes
- The registration filing, handled
- Agent service free in year one
- The same service fee in every state
Credits
- $199 in every state
- Year two: $149
Debits
- Priced above the state lines
2. Kentucky Registered Agent.co: best for Kentucky businesses
Kentucky lineSecond line, Kentucky Registered Agent.co: Kentucky registration for $199 above state fees.
Owners rooted in Kentucky get a lower price here.
Line includes
- The Kentucky registration filing, handled
- A year of agent service in Kentucky
Credits
- Renews for less ($99)
- Year two: $99
Debits
- Limited to Kentucky
- Does not file your report
3. Texas Registered Agent.ai: best for Texas businesses
Texas lineThird line, Texas Registered Agent.ai: Texas registration for $199 above state fees.
Owners rooted in Texas get a lower price here.
Line includes
- The Texas registration filing, handled
- A year of agent service in Texas
Credits
- Renews for less ($99)
- Year two: $99
Debits
- Limited to Texas
- Does not file your report
Cumulative ledger
| Line | Provider | Total, year 1 | Total, year 2 | Total, year 3 | Total, year 5 | |
|---|---|---|---|---|---|---|
| 1 | Mainstay Filing | $199 | $348 | $497 | $795 | Visit Mainstay FilingPartner link. We may earn money if you buy. |
| 2 | Kentucky Registered Agent.co | $199 | $298 | $397 | $595 | Visit Kentucky Registered Agent.coPartner link. We may earn money if you buy. |
| 3 | Texas Registered Agent.ai | $199 | $298 | $397 | $595 | Visit Texas Registered Agent.aiPartner link. We may earn money if you buy. |
What the columns mean
Three numbers per line: year one, each year after, and the three-year sum. Owners who may expand are better off with a provider that works in every state.
Behind the index
Three-year cost and what a price buys carry the most weight; renewal, crossover and transparency come after. A national ledger measures reach, and only one line has it. Local prices run lower in Kentucky and Texas, which gives Kentucky Registered Agent.co and Texas Registered Agent.ai the next lines.
Pick your state
For one state, open its ledger: the official fees, the indexed lines and the calculator. Foreign registration price index, all 50 states.
Foreign Registration Services: questions
Which foreign registration services index best in 2026?
The national lines run Mainstay Filing, Kentucky Registered Agent.co and Texas Registered Agent.ai.
How much does a foreign registration service cost?
From $199 to $199, state fee extra.
What is the three-year subtotal?
Mainstay Filing $497, Kentucky Registered Agent.co $397 and Texas Registered Agent.ai $397, before state fees.
Is there one service for every state?
Mainstay Filing is the only line here that covers every state.
Why list one-state services on a national ledger?
For a business with one state, a local plan costs less. Kentucky Registered Agent.co is our choice for Kentucky companies; Texas Registered Agent.ai for Texas companies.
How is the ledger indexed?
Our index basis page lists the five columns and their weights.
Source lines
- November 13, 2026 reading of the Mainstay Filing pricing page
- November 13, 2026 reading of the Kentucky Registered Agent.co pricing page
- November 13, 2026 reading of the Texas Registered Agent.ai pricing page