Cold email tools
SEMAOS vs Instantly
TL;DR. Different jobs. Instantly is cold-email-at-scale infrastructure — unlimited connected inboxes, automatic rotation, a 1M+ warmup pool, and a 450M-contact lead finder — built to run high-volume cold outbound. SEMAOS sends fewer, more personal 1:1 emails from your own Gmail/Outlook mailbox, and also runs newsletters/broadcasts, with a 0–100 engagement score per contact. Pick Instantly for volume across many inboxes; pick SEMAOS for personal outreach and newsletters from a small team's real mailboxes.
How they compare
| Dimension | SEMAOS | Instantly |
|---|---|---|
| Primary model | Mailbox-native 1:1 sequences + broadcast | Cold-email-at-scale sending infrastructure |
| Sending | Your own Gmail/Outlook (1:1) + SEMAOS sending (broadcast) | Unlimited inboxes + automatic rotation |
| Newsletters / broadcasts | Yes — designed broadcasts over a sending domain | No — cold sequences only |
| A/B testing | Yes — subject + content tests on broadcasts; winner auto-sent to the rest, or held for your approval | Yes — "A/Z" testing, up to 26 variants per step; opt-in auto-optimize |
| Engagement scoring | Yes — 0–100 score + Hot/Warm/Cool tiers | No — campaign reporting, not a per-contact score |
| Email warmup | Domain warmup enforcement; no warmup network | Yes — 1M+ warmup pool, unlimited |
| Built-in lead database | No — bring your own (CSV import) | Yes — Lead Finder (~450M, credit-metered) |
| Multichannel | Email only | Largely email-only (no native LinkedIn/SMS) |
| Unified reply inbox | Reply detection pauses sequences on Outlook and platform sends (not Gmail yet); no central inbox | Yes — Unibox across all mailboxes |
| Pricing model | Flat, seats included, contacts unmetered | Flat tiers + credits/CRM/AI add-ons stack |
| Best for | Small teams, email-first, 1:1 + newsletters | High-volume cold outbound at scale |
When is Instantly the better choice?
Instantly is the better choice when volume comes first: many inboxes, automatic rotation and a lead database in one tool.
- Your motion is high-volume cold email and you want unlimited inboxes with automatic rotation plus a large warmup pool to sustain volume. That's Instantly's core; SEMAOS sends from a rep's own real mailboxes, up to three per person.
- You want a built-in lead database and warmup in the same tool as sending, for a self-contained cold-outbound stack.
- You're optimizing primarily for deliverability at scale across many domains and disposable inboxes.
When is SEMAOS the better choice?
SEMAOS is the better choice when you want personal 1:1 email and newsletters sent from your team's real mailboxes.
- You send from your own mailbox, 1:1. Personal outreach from your real Gmail/Outlook that lands in Primary — the opposite of volume across throwaway inboxes.
- You also run newsletters/broadcasts. Instantly is cold-sequences-only; SEMAOS does both from one product.
- You want a real engagement score. A 0–100 score and tiers per contact you can branch sequences on — beyond Instantly's campaign-level reporting.
- You want flat, transparent pricing. Seats included, contacts unmetered — no leads/CRM/AI-agent credits stacking onto a low headline price.
What are SEMAOS's daily sending limits?
One rep on a paid SEMAOS plan can send up to 3,000 emails a day from their own mailboxes: 250 to 1,000 per connected Gmail or Outlook mailbox depending on the kind of account, with up to 3 mailboxes per person. Broadcasts and large enrollments go over platform sending instead, which a new custom domain ramps up over at least 21 days.
| Sending from | Limit | Counts against your plan? |
|---|---|---|
| One connected mailbox | 250 to 1,000 a day | No |
| One rep, 3 mailboxes | Up to 3,000 a day | No |
| New custom domain, week 1 | 100 a day | Yes, the monthly platform pool |
| New custom domain, week 2 | 500 a day | Yes, the monthly platform pool |
| New custom domain, week 3 | 2,000 a day | Yes, the monthly platform pool |
| Warmed-up domain | The plan's pool: 7,500 (Solo) to 200,000 (Business) a month, then the on-demand bank on paid plans | Yes |
Each warmup step also waits until the domain has sent enough to earn the next one, so a domain that sends little stays on a lower step. SEMAOS sets each mailbox's cap by the kind of account: 250 for a personal Outlook account, 400 for a personal Gmail account, and 1,000 for a Google Workspace or Microsoft 365 account. A provider can still refuse sooner, for example on a new account. SEMAOS is not built to rotate dozens of throwaway inboxes. The ceiling is set by your team's real mailboxes and one warmed-up domain (5 on Business).