NuMailNuMail
vs
Instantly logoInstantly

If you run one inbox, use Instantly.
If you run ten clients, use NuMail.

Instantly is the best $47/mo cold-email tool in the market. We are not trying to undercut it. We are 3× the price and built for a completely different buyer: the agency owner who needs sub-account billing, per-workspace webhooks, and a real API. Here's the unvarnished comparison.

vs Instantlyvs SmartLeadvs EmailBison
Last updated · May 2026·Instantly Hyperleads · scale plan benchmark·NuMail Pro · most-common tier
▸ The straight verdict

Where each one wins.

No "we win everything" pretence. They built a great product for a different buyer.

NuMail NuMail · $297+Agencies / RevOps engineers
  • Stripe Connect sub-account billing: bill end-clients on your own Stripe, no NuMail brand on their invoice
  • Per-workspace webhooks: one HMAC-signed endpoint per client, not one global firehose
  • Native MCP server: Claude Desktop / Cursor / any agent drives campaigns, leads, mailboxes and replies by name
  • 2.4-second P50 reply detection: Pub/Sub + Graph webhooks, not polling
  • Statistical A/B winner with auto-promote, not "look at the chart and pick one"
  • White-label custom domain on Agency tier: app.youragency.com
  • Real, public REST API (/v1) with Bearer-key auth on day one
Instantly logo Instantly · $47+Solo SDRs / founders
  • Lower price floor: $47/mo for the basic plan vs our $297/mo
  • Built-in lead database (Hyperleads, 160M+ contacts), convenient if you don't have a data source
  • Larger affiliate / influencer ecosystem and community
  • Simpler UX for people new to cold email, with fewer dials and fewer concepts
  • Public roadmap and changelog cadence is fast (ours too, see /changelog)
  • Has been around longer; brand recognition is higher among solo SDRs
▸ Feature-by-feature

The granular truth.

Pulled May 2026. We update this page when either side ships meaningful changes.

NuMailInstantly
Sending
Mailboxes per workspaceUnlimited (all tiers)Unlimited (paid)
Per-mailbox throttleDaily limit, send window, optional gapAvailable, less granular
Slow ramp for new mailboxes+4/day to the box's limit; on for new SMTP~21 days, single TZ
Durable per-lead send pipelinePer campaign-lead, auto-cancel on bounce/unsubCron-style poller
Reply & Unibox
P50 inbound detection2.4 seconds~30 seconds
Reply classificationpositive · OOO · question · unsub · forwardpositive / negative only
AI reply assistant (HITL)Approve / Edit / Reject per draftNo
Agency / billing
Stripe Connect sub-account billingAgency tierNo
White-label custom domainAgency tierNo
Hide "Powered by"Agency tierNo
Developers
Public REST API/v1 · Bearer keys · day oneLimited, private beta
Native MCP serverHosted · 14 toolsNo
WebhooksPer-workspace, multiple URLs scoped by eventSingle endpoint, Zapier-mediated
Pricing
Starting price$297 / mo (Pro)$47 / mo (Growth)
Sends at Pro tier500k @ $2975k email accounts @ $97 (different metric)
Free trial14 days, no card14 days, card on file
▸ Honest recommendation

Pick the one built for you.

Choose Instantly if…

You're running outbound for yourself or one company, you want the cheapest fully-managed option, and you don't need a real API.

  • You're a solo SDR or founder, doing outbound for one product
  • You want a built-in lead database (Hyperleads) and don't have a data provider
  • You don't have engineers, agents, or scripts driving your outbound
  • You're sending under 50k emails / month and price is the top decision factor
  • You're fine with a single global webhook and Zapier in the middle

Choose NuMail if…

You're running outbound for more than one client, you need to bill them, or you have engineers/agents involved.

  • You're an agency with 3+ clients and you'd like to stop sending invoices by hand
  • You want Claude / Cursor / any MCP-aware agent to drive campaigns from natural language
  • You need per-workspace webhooks to route events to each client's own systems
  • You care about reply latency: 2.4s is meaningfully better than 30s for live conversations
  • You want statistical A/B promotion instead of eyeballing the dashboard
  • You want white-label on a custom domain (app.youragency.com) without a deal
We moved off Instantly the week we needed to onboard our second agency client. Sub-account billing was the only thing we couldn't fake with Notion + Stripe links.
James Kim · Ops · Cypress Group
▸ Migration · same-week

A managed migration
at no extra cost on Agency.

Send us a CSV export from Instantly. We move your campaigns, leads, mailbox auth, suppression list, and webhooks in under 48 hours. Live before your next billing cycle.

Start a 14-day trialSchedule a migration call →

Run the comparison
in your dashboard.

14 days. Every feature on every tier. We'll even import your Instantly campaigns to make the side-by-side honest.

Start free trial →Full pricing