NuMail
EmailBisonEmailBison is the well-made, no-frills cold-email tool you'd recommend to a founder doing their first 1,000 emails. NuMail is what you graduate to once you're running outbound for ten clients, signing MSAs, and routing webhooks. The two barely overlap.
Honest read: these tools serve different buyers and the differences are obvious.
NuMail · $149+Agency / RevOps infrastructure EmailBison · $59+Solo founders / low-volumeCompared May 2026. EmailBison ships fewer surfaces by design, so several rows are intentionally one-sided.
| NuMail | EmailBison | |
|---|---|---|
| Workspaces & team | ||
| Multi-workspace | Up to 5 (Pro), unlimited (Agency) | Single workspace |
| Sub-workspaces for clients | Agency tier | — |
| Stripe Connect sub-billing | Agency tier | — |
| Team members + roles | Owner / Admin / Member / Read-only | Single role |
| SSO (SAML / OIDC) | Agency | — |
| Reply pipeline | ||
| P50 inbound detection | 2.4 s · push (Pub/Sub + Graph) | ~60 s · polling |
| Reply classification | 5 classes | — |
| AI reply assistant | Claude HITL · Approve/Edit/Reject | — |
| Auto-stop on reply | Per campaign | Global setting |
| Campaigns | ||
| Multi-step sequences | Drag-and-drop, unlimited steps | Up to 7 steps |
| A/B variants | Statistical auto-winner | — |
| Spintax | With live preview | Basic |
| Variable picker from custom fields | Auto-detected per workspace | Fixed set |
| Deliverability | ||
| Warmup (intra-workspace) | Included on all tiers | Included |
| Cross-customer warmup pool | Tier-banded pairing | — |
| Per-mailbox throttle | Configurable, 90s default | Fixed throttle |
| Mailbox-local TZ daily reset | Yes | Single account TZ |
| Developers | ||
| Public REST API | /v1 · OpenAPI 3.1 day one | — |
| Native MCP server | @numail/mcp · 47 tools | — |
| Webhooks | Per-workspace, HMAC signed | Single global URL via Zapier |
| TypeScript / Python SDKs | Both official | — |
| CRM & sync | ||
| HubSpot bidirectional | Native on Pro+ | Via Zapier |
| Salesforce | v2 roadmap | — |
| Pricing | ||
| Starting price | $149 / mo | $59 / mo |
| Volume at entry | 50k sends / mo | 10k sends / mo |
| Free trial | 14 days, no card | 7 days |
You're one founder, you want one inbox, and you don't want to think about agencies, APIs, or sub-billing.
You're running outbound for more than yourself, or you want any of the agency/API surfaces in the table above.
EmailBison got us our first 30 booked meetings. NuMail is what we moved to the week we hired our second AE. Different tool for a different version of the business.
CSV export from EmailBison, OAuth re-connect your mailboxes, we re-create your sequences and suppress your dupes. You're live before your next renewal.
14-day trial. Every feature unlocked. Bring your EmailBison sequences and run them side-by-side.