AI Outbound & SDR Engine Development
We build the cold email AI personalization layers, lead enrichment pipelines, and sequence orchestration engines that AI outbound startups ship to production.
What we build
Cold email AI personalization
Per-prospect personalization layers, prompt engineering for tone matching, and multi-step research-then-write pipelines.
Lead enrichment pipelines
Multi-source enrichment (Clay, Apollo, ZoomInfo, LinkedIn) with validation, deduplication, and scoring.
Sequence orchestration
Multi-channel sequence engines (email + LinkedIn + phone) with branching logic and response handling.
Reply classification
LLM-based reply intent classification: interested, not now, not relevant, or out of office, each with its own routing rule.
CRM sync layer
Bi-directional sync with HubSpot, Salesforce, Pipedrive, Outreach, and Apollo. Activity logging and deal updates.
Deliverability infrastructure
Sender reputation management, warmup automation, bounce handling, and domain rotation strategies.

Marketing data that resists wishful thinking
Reference architecture
- Enrichment API
- Personalization LLM
- Sequence Engine
- Delivery Infrastructure
- Reply Classifier
- CRM Sync
A typical AI outbound system: enrichment feeds the personalization model, the sequence engine schedules multi-channel touches, delivery infrastructure protects sender reputation, and the reply classifier routes responses back into your CRM.
Integrations shipped across 25+ partners.
Lead data
- Apollo
- Clay
- ZoomInfo
- Hunter
- RB2B
CRMs
- HubSpot
- Salesforce
- Pipedrive
- Outreach
- Salesloft
- Apollo
Email infrastructure
- SendGrid
- Postmark
- Resend
- Mailgun
- AWS SES
Deliverability
- GlockApps
- MailReach
- Smartlead
AI providers
- OpenAI
- Anthropic
- OpenRouter
Engagement tracking
- Mixpanel
- Amplitude
- Segment
Which engagement fits
Project Build
For building the core engine: enrichment, personalization, sequencing, and delivery, in a focused 6–14 week scope.
Explore Project BuildEmbedded Squad
For evolving roadmaps as the product scales: a dedicated team that ships alongside yours week over week.
Explore Embedded SquadTech Audit
For de-risking your current build before deciding scope: a 5-day diagnostic of architecture, deliverability, and readiness to scale.
Explore Tech AuditCompliance considerations
| Standard | Status | What we ship |
|---|---|---|
| GDPR / UK GDPR | Compliant | Lawful-basis handling, data subject rights, and retention controls baked into enrichment and storage. |
| CCPA / CPRA | Compliant | Consumer opt-out handling and do-not-sell signals wired through the enrichment and sequencing layers. |
| CAN-SPAM / CASL | Compliant | Suppression lists, unsubscribe enforcement, and physical-address/identification requirements on every send. |
| SPF / DKIM / DMARC | In progress | Sender authentication setup and monitoring, configured per domain during deliverability hardening. |

Built for marketing engineering
Attribution, personalisation, and scale in production
Marketing AI products live or die on data quality, latency, and whether the numbers hold up under real traffic. We build for the dashboard that a CMO opens at 8am on Monday.
Frequently asked questions
Almost certainly. We ship production integrations across lead data (Apollo, Clay, ZoomInfo, Hunter, RB2B), CRMs (HubSpot, Salesforce, Pipedrive, Outreach, Salesloft, Apollo), and email infrastructure (SendGrid, Postmark, Resend, Mailgun, AWS SES). If a tool has an API, we can wire it in. If it doesn’t, we’ll tell you the honest workaround.
Building an AI outbound product? Schedule a meeting.
We’ve shipped the personalization, enrichment, and deliverability layers AI outbound startups run in production. Tell us what you’re building.