kitio.aiMails.ai vs TestSprite
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. TestSprite has the lower starting price: about $19 a month, against $20 for Mails.ai.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Inbox per agent through one API call
- TypeScript and Python SDKs
- MCP server
- Injection scan on inbound mail
- Send from your own domain
- Autonomous test generation
- MCP server
- Frontend and API tests
- Fix suggestions
- Test schedules
| Feature | Mails.ai | TestSprite |
|---|---|---|
| Best for | Email API that gives AI agents their own inboxes | AI testing agent that checks AI-generated code from your IDE |
| Category | Coding | Coding |
| Pricing model | Freemium | Freemium |
| Starting price | $20/mo | $19/mo |
| Free plan | Yes | Yes |
| Made by | Mails.ai | TestSprite |
| Based in | – | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
|
|
Both offer: MCP server.
Pricing compared
TestSprite has the lower starting price: about $19 a month, against $20 for Mails.ai.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 3,000 emails per month
- 3,000 inbound replies per month
- 1 agent
Pro
$20/mo
- 50K emails per month
- 5 agents
- Send from your own domain
- Signed webhooks
Scale
$99/mo
- 250K emails per month
- Unlimited agents
- Per-agent allowlists and send limits
5 plans
Free
Free
- 150 credits per month
- 1 environment
- 30 days run history
- PR auto-test on 1 repo
Starter
$19/mo
- 400 credits per month
- First month free
- Self-healing tests
Standard
$39/mo
- 800 credits per month
- 3 environments
- 90 days run history
Pro
$69/mo
- 1,600 credits per month
- Unlimited environments
- Priority test execution
Enterprise
From $199/mo
- From 10 seats
- From 5,000 credits / month
- Single-tenant deployment
- Customized AI model
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Mails.ai
- Free tier with no card
- Controls on who an agent can email
- Works with major coding agents
- Free plan allows just 1 agent
- Custom domains need Pro
- Dedicated IP is on request only
TestSprite
- Fits AI coding workflows
- Low-cost entry plan
- Covers UI and API
- Credits limit large suites
- Newer than established tools
Which one should you choose?
Choose Mails.ai if you want:
- Free tier with no card
- Controls on who an agent can email
- Works with major coding agents
Watch out: free plan allows just 1 agent.
Choose TestSprite if you want:
- Fits AI coding workflows
- Low-cost entry plan
- Covers UI and API
Watch out: credits limit large suites.
Mails.ai vs TestSprite FAQ
What is the difference between Mails.ai and TestSprite?
Mails.ai: Email API that gives AI agents their own inboxes. TestSprite: AI testing agent that checks AI-generated code from your IDE. Both are coding tools.
Is Mails.ai or TestSprite cheaper?
TestSprite has the lower starting price: about $19 a month, against $20 for Mails.ai.
Do Mails.ai and TestSprite have free plans?
Mails.ai: Yes. TestSprite: Yes.
Who makes Mails.ai?
Mails.ai is made by Mails.ai.
Who makes TestSprite?
TestSprite is made by TestSprite, based in United States.
Which should I choose, Mails.ai or TestSprite?
Choose Mails.ai if you value free tier with no card and controls on who an agent can email. Choose TestSprite if you value fits ai coding workflows and low-cost entry plan.