Pricing that scales with your agents

Start free with 3 inboxes and upgrade when your agents need more. Paid plans include a monthly AI credit for the agent you build on Lumbox.

Free

$0/mo

Get started. No credit card required.

Start for free

3 agent inboxes
500 emails received / month
100 emails sent / month
Bring your own model key
OTP & verification link extraction
MCP server access
REST API access

Starter

$9/mo

For solo developers running automations.

Get started

10 agent inboxes
5,000 emails received / month
2,000 emails sent / month
$2 AI credit / month
OTP & verification link extraction
Webhooks
Custom domains (MX, SPF, DKIM)
MCP server access

Pro

Recommended

$29/mo

For teams running multiple AI agents.

Get started

50 agent inboxes
25,000 emails received / month
10,000 emails sent / month
$10 AI credit / month
Everything in Starter
AI email categorization (BYOK)
Thread routing
Contact lists & marketing emails

Scale

$99/mo

For production AI pipelines at scale.

Get started

250 agent inboxes
100,000 emails received / month
50,000 emails sent / month
$40 AI credit / month
Everything in Pro
Priority support
SLA guarantee
Dedicated deliverability

Need more? Contact us for enterprise pricing with dedicated infrastructure and SLAs.

Compare plans

Feature	Free	Starter	Pro	Scale
Inboxes & Volume
Agent inboxes	3	10	50	250
Emails received / mo	500	5,000	25,000	100,000
Emails sent / mo	100	2,000	10,000	50,000
Core Features
OTP extraction	Included	Included	Included	Included
Verification link extraction	Included	Included	Included	Included
REST API access	Included	Included	Included	Included
MCP server access	Included	Included	Included	Included
Webhooks	Not included	Included	Included	Included
Custom domains	Not included	Included	Included	Included
Browser tasks & meeting bots	Not included	Included	Included	Included
Built-in agent
Monthly AI credit	Your own key	$2	$10	$40
Knowledge base storage	2 MB	10 MB	50 MB	250 MB
Bring your own model key	Included	Included	Included	Included
Advanced
AI categorization (BYOK)	Not included	Not included	Included	Included
Thread routing	Not included	Not included	Included	Included
Contact lists & marketing	Not included	Not included	Included	Included
Priority support	Not included	Not included	Not included	Included
SLA guarantee	Not included	Not included	Not included	Included
Dedicated deliverability	Not included	Not included	Not included	Included

Technical specifications

Monthly AI credit

Paid plans

Paid plans include credit for the model and embedding calls your built-in agent makes. On Free, or whenever you prefer, the agent runs on your own model key.

Starter: $2 AI credit / month
Pro: $10 AI credit / month
Scale: $40 AI credit / month

Data sovereignty

All plans

Your email data stays encrypted at rest with AES-256-GCM. Model keys you bring are stored encrypted too.

AES-256-GCM encryption at rest
Bring your own model key on any plan
SOC 2 compliance roadmap

Frequently asked questions

What counts as an email received?: Any inbound email delivered to an agent inbox: OTPs, verification links, newsletters, replies. Emails that bounce or are rejected before delivery don't count.
Can I create inboxes dynamically via API?: Yes. Your agents can call POST /v1/inboxes at runtime to provision a new email address in milliseconds. The inbox limit applies to concurrently active inboxes, not total ever created.
What happens when I hit my limit?: The API returns a 402 error with a clear message. Inbound emails already in transit will still be delivered. We never silently drop emails. You'll know before anything is lost.
What does the monthly AI credit pay for?: The model and embedding calls made by the agent you build on Lumbox, such as writing replies and searching its knowledge base. Starter includes $2 a month, Pro $10 and Scale $40. On the Free plan the built-in agent runs on your own model key.
Do you support Bring Your Own Keys (BYOK)?: Yes, on every plan. Add an OpenAI, Anthropic or Google key and Lumbox uses it for your agent's model calls instead of the included credit. Your key is encrypted at rest with AES-256-GCM.
Can I use my own domain for inboxes?: Yes on Starter and above. Add your domain, configure MX/SPF/DKIM records, and your agents get addresses like agent@yourdomain.com.