Plans & Pricing
Pay-As-You-Go · Prepaid Balance
CallStack AI uses a prepaid balance model — no monthly fees, no subscriptions:
- Top up USD balance and pay only for what you use
- Balance never expires
- Top up via USDT or Alipay / WeChat (via Dujiaoka)
Rates
| Item | Rate |
|---|---|
| Billing unit | $1 = 500,000 quota units |
| Minimum top-up | $1 |
| Payment methods | USDT (instant) / Alipay / WeChat |
> Per-model quota consumption is listed on the Supported Models page.
How to Top Up
- Log in to manage.callaiapi.com → click your avatar → Top Up
- Choose USDT or Dujiaoka, follow the payment prompt
- Balance arrives instantly — start calling APIs right away
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Flexible plans designed for teams of every size — from startups to global enterprises.
- Access to all standard models
- Basic API key management
- Standard rate limits
- Usage analytics dashboard
- Community support
- All standard + advanced models
- Team-based access control (RBAC)
- Enhanced rate limits
- Content safety filters
- Advanced analytics & cost attribution
- Priority support (email & chat)
- All models + dedicated capacity
- SSO / SAML / OIDC integration
- Custom rate limits & SLA
- PII redaction & data residency
- Audit logging & compliance reports
- Private Azure deployment option
- Dedicated solutions engineer
What's Included in Every Plan
| Feature | Starter | Professional | Enterprise |
|---|---|---|---|
| Multi-model access | ✅ | ✅ | ✅ |
| OpenAI-compatible API | ✅ | ✅ | ✅ |
| Usage dashboard | ✅ | ✅ | ✅ |
| Content safety filters | Basic | Advanced | Custom |
| RBAC & team management | — | ✅ | ✅ |
| SSO integration | — | — | ✅ |
| PII redaction | — | — | ✅ |
| Audit logging | — | Basic | Full |
| Data residency controls | — | — | ✅ |
| Uptime SLA | 99.5% | 99.9% | 99.95% |
| Support | Community | Priority | Dedicated |
| Private deployment | — | — | ✅ |
Payment Methods
Frequently Asked Questions
How does billing work?
Prepaid balance model — no monthly fees. Balance is deducted in real time as you make API calls. Requests are rejected when balance runs out. Enterprise customers with high volume can contact sales for invoice-based billing.
Do you offer a free trial?
Contact us to request a trial credit.
Can we get a custom SLA?
Enterprise plans include customizable SLA terms. Contact our solutions team to discuss your requirements.
What regions are available?
We operate globally with presence in Asia Pacific (Hong Kong, Singapore, Tokyo), Americas, and Europe.
Need a Custom Solution?
Our solutions engineers will help you design the right architecture.
[email protected]