21st Agents SDK Pricing 2026
Plans, hidden costs, and alternatives compared
Cite this data: Toolradar, 21st Agents SDK pricing verified Oct 2026, toolradar.com/tools/21st-agents-sdk/pricing
21st Agents SDK starts at $6/month on the Builder plan.
Verified Oct 2026 from the official pricing page.
Is 21st Agents SDK worth the price?
21st.dev publishes yearly list prices: Builder $6/month, Builder + AI $15/month, Team $7.50/seat/month (2–50 seats).
Yearly is advertised as 25% off. Marketplace copy and MCP are unlimited on Builder.
AI credits start on Builder + AI (500 to 2,000). Extra packs are $5 per 100 and they roll over.
Payments are non-refundable. Cancel anytime.
This is best for a solo who only needs MCP copy at $6, or who will actually burn 500+ credits at $15.
Pricing Plans
Builder
$6/month
- $6/month billed yearly
- Unlimited copies, MCP installs, icons
- No monthly AI credits
Builder + AI
$15/month
- $15/month billed yearly
- 500, 1,000, or 2,000 AI credits/month
- Multi-model sketch, code mode
Team
$7.50/month
- $7.50 per seat/month billed yearly
- 2–50 seats
- Optional AI credits per seat
Extra AI credits
$5 / 100 credits
- +100 for $5
- Rolls over
- Builder + AI and Team + AI
Hidden Costs & Gotchas
These $ are billed yearly. The page says save 25% vs quarterly.
Extra credits $5/100. They roll over. Plan credits are monthly.
Team AI is optional per seat. $7.50 is marketplace + admin, not 2,000 credits.
Which Plan Do You Need?
$6/month official yearly. Unlimited MCP.
$15/month yearly. 500–2,000 credits.
How 21st Agents SDK compares
3 of 4 direct competitors offer a free plan.
| Tool | Starting price | Free plan |
|---|---|---|
| 21st Agents SDK | $6/month, billing unit not specified | No |
| LangChain | $39/month, billing unit not specified | Yes |
| Devin | $20/month, billing unit not specified | No |
| Convai | $5/month, billing unit not specified | Yes |
| Firecrawl MCP | $16/month, billing unit not specified | Yes |
21st Agents SDK Pricing FAQ
How much does 21st Agents SDK cost?
21st Agents SDK starts at $6/month on the Builder plan. It offers 3 paid tiers ranging from $6/month to $15/month.
Does 21st Agents SDK have a free plan?
21st Agents SDK does not offer a permanent free plan. Paid plans are required from day one.
What is the cheapest 21st Agents SDK paid plan?
The cheapest paid plan for 21st Agents SDK is "Builder" at $6/month. Key features include: $6/month billed yearly, Unlimited copies, MCP installs, icons, No monthly AI credits.
What are alternatives to 21st Agents SDK?
Alternatives to 21st Agents SDK include LangChain, Devin, Convai, Firecrawl MCP. LangChain starts at $39/month, billing unit not specified; Devin starts at $20/month, billing unit not specified; Convai starts at $5/month, billing unit not specified.
21st Agents SDK alternatives
Direct competitors. Starting prices match the table above.
Sources
- Official 21st Agents SDK pricing: 21st.dev/pricing (verified Oct 2026)
- Cite this data: Toolradar, 21st Agents SDK pricing verified Oct 2026, toolradar.com/tools/21st-agents-sdk/pricing
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