Pricing
Simple credit-based pricing that scales with your agents. No per-seat fees.
Test your agent's voice. No commitment.
- 1 Inbox (@spix.sh)
- 1,000 Email events/mo
- 0 Usage credits
- 0 Concurrent calls
- Community support
Your first agent that can call, text, and email.
- 5 Inboxes
- 10,000 Email events/mo
- 500 Usage credits/mo
- 2 Concurrent calls
- Phone number add-ons
- Email support
Multiple agents running production workloads.
- 25 Inboxes
- 50,000 Email events/mo
- 5,000 Usage credits/mo
- 10 Concurrent calls
- Phone number add-ons
- 8-hour SLA support
High-volume agent operations with dedicated support.
- 100 Inboxes
- 250,000 Email events/mo
- 25,000 Usage credits/mo
- 30 Concurrent calls
- Phone number add-ons
- 2-hour SLA + Slack channel
Custom limits, dedicated infrastructure, and SLAs.
- Custom inboxes
- Custom email events
- Custom usage credits
- Custom concurrency
- Dedicated support engineer
- Custom rate limits
How credits work
Credits are the universal currency across all Spix channels. Each action consumes a fixed number of credits.
| Action | Credits | Note |
|---|---|---|
| Outbound call (per minute, connected) | 10 | Minimum 10 credits per answered call |
| Outbound call (unanswered attempt) | 1 | |
| Outbound SMS (per segment) | 5 | 160 GSM-7 chars or 70 Unicode chars per segment |
| Inbound SMS (delivered) | 5 | |
| Outbound email (after plan allowance) | 1 | |
| Inbound email (after plan allowance) | 1 | |
| STOP / opt-out suppression | 0 | Always free |
Example: 4m 12s outbound call
Formula: max(10, ceil(duration_seconds / 60) x 10)
252 seconds = ceil(252/60) = 5 minutes = 50 credits
Top-up credit blocks
Need more credits? Buy top-up blocks at volume discounts. Top-up credits roll over while you're on a paid plan.
Add-ons
Available on Agent plan and above.
| Add-on | Price |
|---|---|
| US Local Phone Number | $3/mo |
| US Toll-Free Number | $5/mo |
| Extra Inbox (above plan bundle) | $2/mo |
Credit burn order
Credits are consumed in the most cost-effective order for you.
Monthly email allowance
Email events consume from your plan's email allowance first. Expires at end of billing cycle.
Included usage credits
Calls, SMS, and email overage consume from monthly included credits. Expires at end of billing cycle.
Top-up credits
Purchased credit blocks are used last. Roll over while you're on a paid plan.
Compare plans
Core
| Sandbox | Agent | Operator | Fleet | Enterprise | |
|---|---|---|---|---|---|
| Inboxes | 1 | 5 | 25 | 100 | Custom |
| Email events/mo | 1,000 | 10,000 | 50,000 | 250,000 | Custom |
| Usage credits/mo | 0 | 500 | 5,000 | 25,000 | Custom |
| Concurrent calls | 0 | 2 | 10 | 30 | Custom |
| API rate limit | 5 req/s | 20 req/s | 50 req/s | 200 req/s | Custom |
Channels
| Sandbox | Agent | Operator | Fleet | Enterprise | |
|---|---|---|---|---|---|
| Voice calls (outbound) | – | ✓ | ✓ | ✓ | ✓ |
| SMS (outbound & inbound) | – | ✓ | ✓ | ✓ | ✓ |
| Email (outbound & inbound) | ✓ | ✓ | ✓ | ✓ | ✓ |
| Phone number add-ons | – | ✓ | ✓ | ✓ | ✓ |
| Custom email domains | – | ✓ | ✓ | ✓ | ✓ |
| Custom inbox usernames | – | ✓ | ✓ | ✓ | ✓ |
Integrations
| Sandbox | Agent | Operator | Fleet | Enterprise | |
|---|---|---|---|---|---|
| CLI binary | ✓ | ✓ | ✓ | ✓ | ✓ |
| REST API | ✓ | ✓ | ✓ | ✓ | ✓ |
| MCP server | ✓ | ✓ | ✓ | ✓ | ✓ |
| Webhooks | ✓ | ✓ | ✓ | ✓ | ✓ |
| Dry-run mode | ✓ | ✓ | ✓ | ✓ | ✓ |
Deliverability & Trust
| Sandbox | Agent | Operator | Fleet | Enterprise | |
|---|---|---|---|---|---|
| DKIM / SPF / DMARC | ✓ | ✓ | ✓ | ✓ | ✓ |
| STIR/SHAKEN attestation | – | ✓ | ✓ | ✓ | ✓ |
| 10DLC registration | – | ✓ | ✓ | ✓ | ✓ |
| Number health scoring | – | ✓ | ✓ | ✓ | ✓ |
| Multi-carrier failover | – | – | ✓ | ✓ | ✓ |
Support
| Sandbox | Agent | Operator | Fleet | Enterprise | |
|---|---|---|---|---|---|
| Community | ✓ | ✓ | ✓ | ✓ | ✓ |
| Email support | – | ✓ | ✓ | ✓ | ✓ |
| SLA response time | – | – | 8 hours | 2 hours | Custom |
| Dedicated Slack channel | – | – | – | ✓ | ✓ |
| Dedicated support engineer | – | – | – | – | ✓ |
No surprises.
No per-seat pricing. No hidden fees. Credits roll over on paid plans. Downgrade or cancel anytime. Top-up credits stay frozen for 90 days.