Inbox infrastructure for B2B teams who know why 40% never arrives.
B2B email infrastructure with AI autopilot. Pay only for verified inbox delivery — confirmed by seed monitoring or recipient engagement.
Pay for delivery. Not for sending.
Everything you need for verified inbox delivery
Access & Infrastructure
Integrations
AI
All AI features included. No add-ons, no token meters.
Pay for delivery. Not for sending.
Four ways to use LDM — self-serve or with our team.
Self-serve
- REST API + Webhooks
- MCP + A2A native
- Seed-verified inbox placement
- Sandbox + SDK (Python, Node, PHP)
- Independent warmup audit
- Full UI dashboard
- Campaign builder & sequences
- CRM integrations (amoCRM, HubSpot, Pipedrive)
- Inbox SLA monitoring 24/7
- Teams, roles, audit log, SSO
With our team
- ICP research & list building
- 3–5 email creatives written for you
- Full campaign management
- AI-powered lead qualification
- Monthly invoicing
- 5 interviews with people in your niche
- Pain & objection mapping
- ICP with segments
- Ready-made email sequences
- 6-month outbound plan
Billed only on confirmed inbox placement. Post-paid monthly. No subscription fees, no seats.
Free access — by application
We hand-pick early-access partners. If your ICP fits ours, you get full unrestricted API access in exchange for feedback and a case study.
A clear line of responsibility
We deliver to inbox by protecting infrastructure quality — not by forcing bad content through.
You write the message. If it triggers spam filters across providers, we pause the campaign and ask you to revise it.
We don't push failing creative through aggressive rotation. That destroys deliverability for everyone on our network.
We handle relays, IPs, warmup state, rotation, and provider routing. If a relay can't reach a recipient's provider, we switch it. If a sending account degrades, we rotate it out.
You never touch this layer. It's our job.
When we pause a campaign
- Spam folder hits exceed our threshold across multiple seed providers
- Bounce rate spikes above safe limits
- A creative is flagged by pre-send analysis as high spam-risk
- Recipient lists show poor hygiene (high invalid / catch-all ratio)
When this happens, the campaign stops. You get a report with seed evidence and a recommendation. Resume after the issue is fixed — usually a creative revision or list cleanup.
If you need "deliver anything at any cost regardless of content" — LDM is not your tool. We recommend Instantly or Smartlead.
Questions, answered
How do you confirm a message reached the inbox?
Through a global seed network (real mailboxes across Gmail, Outlook, Yahoo, Mail.ru, Yandex, T-Online, and 3 more) plus engagement signals from the recipient.
What happens if your seed monitoring is wrong?
We don't bill for that delivery. The default is no charge unless inbox-confirmed.
Can I use my own domains and accounts?
Yes. BYO accounts run at a discounted per-delivery rate.
How are you different from Instantly or Smartlead?
We don't sell sending volume. We sell verified inbox placement — billing aligns with the only metric that matters for outreach ROI.
What happens if my creative starts hitting spam folders?
We pause the campaign automatically. You get a report showing which seed providers flagged the creative and why. To resume, you revise the creative and we restart sending.
We don't try to "push through" with aggressive rotation. Forcing failing creative damages your domain reputation and ours, and makes future campaigns worse. Pausing is protection, not punishment.
Who is responsible for the creative — me or you?
You. The creative is yours: subject line, body copy, CTA, list quality.
The infrastructure is ours: relays, IPs, warmup, rotation, routing, seed monitoring, deliverability diagnostics.
If a creative fails — we tell you why, with seed evidence. If a relay fails — we rotate it, you don't even see it.
This split is non-negotiable. It's the reason our inbox rate stays high across all clients on the network.
Can you guarantee inbox delivery for any creative?
No. And anyone who promises that is either lying or burning your domain reputation to make a number look good for one month.
We guarantee infrastructure quality. The creative is your variable. Together, that produces inbox rate. If the creative is wrong, no infrastructure on earth will fix it sustainably.
When and how am I billed?
Per inbox-confirmed delivery, post-paid monthly. No subscription fees, no seats.