Instantly vs Mailforge 2026: Platform vs Mailbox Infra

Instantly.ai and Mailforge get compared like rivals, but they're not in the same category. Instantly is a full outreach platform: sequencer, CRM, unified inbox, lead database, AI campaign builder, warmup pool, and placement testing in one login. Mailforge ships mailbox infrastructure only: domains, SMTP inboxes, automated DNS setup, no sequencer or CRM at all. That mismatch matters more than the price gap.

By Rishabh Ambasta, Founder, Modern Inbound.

You've probably seen "$47 vs $2" screenshots on cold email forums. That framing skips what each price buys: a sending platform versus a mailbox and nothing else. The table below breaks out pricing, what's included, and real cost at scale.

How do Instantly and Mailforge compare on price and features?

Instantly starts at $47/month advertised, per Instantly's pricing page, though the $37.60/month Growth plan billed annually is the more common entry point. Mailforge starts at $2-$3 per mailbox/month on shared IPs, per Mailforge's pricing page, shipping zero sending software.

Feature	Instantly	Mailforge
Starting price	$47/mo advertised ($37.60/mo on annual Growth plan)	$2-$3/mailbox/mo on shared IPs
Sequencer included	Yes	No
CRM included	Yes, as an add-on that stacks into the total	No
Unified inbox	Yes	No
Warmup + placement testing	Built in	Not included
Real cost at 30 mailboxes	~$150/mo software (Growth, SuperSearch, CRM, Inbox Placement) plus 30 Workspace seats at $6-$10 each	$60-$90/mo total, plugged into a sequencer you already own

Why doesn't comparing Instantly to Mailforge really work?

Mailforge is infrastructure only, and you plug it into whatever sending software you already run, including Instantly itself. Most "Instantly vs Mailforge" searches miss this. You're not choosing between two seats at the same table, you're choosing between a staffed kitchen and a stove you still have to install.

Is Mailforge actually cheaper than Instantly in 2026?

At 30 mailboxes sending 40 emails a day, Mailforge's shared-IP infra runs $60-$90/month total, per Mailforge's pricing page. Instantly's Growth plan plus needed add-ons commonly lands near $150/month, per Instantly's pricing page, before a mailbox is bought. Add 30 Workspace seats at $6-$10 each and Instantly's real bill runs $330-$450/month.

Mailforge's $60-$90/month only covers mailboxes; you still need a sequencer unless you already own one. It wins only if you already pay for sending software and accept shared-IP SMTP. With zero stack today, Instantly comes out cheaper on a yearly plan once you count what you'd otherwise buy separately.

What does Instantly ship that Mailforge doesn't?

Everything in the table above beyond mailboxes: the sequencer, CRM, unified inbox, lead database, AI campaign builder, and placement testing. Mailforge hands you domains and inboxes with automated DNS setup, nothing else.

Mailforge's sibling product, Infraforge, adds dedicated IPs, pre-warmed mailboxes, and an API at $3-$4 per mailbox/month. It's still infrastructure only, not a sequencer or CRM, so don't treat it as a platform upgrade.

When does Mailforge's shared-IP infra actually save you money?

Mailforge wins the math only when you already own a sequencer and just need cheap mailboxes to feed it. At $2-$3 per mailbox, it's one of the lowest-cost mailbox infra options around. The tradeoff: shared IPs mean your deliverability partly rides on other customers' sending habits too.

Weigh that against Instantly's pros: dedicated warmup, placement testing, one dashboard. The cons show up in the bill once mailbox seats stack on top of software.

Pick Instantly or Mailforge: what's the actual verdict?

Pick Instantly if you have no sending software yet and want sequencer, CRM, unified inbox, and warmup in one subscription, even at roughly $150/month plus Workspace seats. Pick Mailforge if you already pay for a sequencer and just need cheap, shared-IP mailboxes to plug into it.

Don't buy Mailforge expecting a sequencer. Don't buy Instantly if all you need is inboxes for a tool you already own. The FAQ below covers the Infraforge question and the mailbox math.

FAQ

Is Mailforge a replacement for Instantly?

No. Mailforge only provides mailbox infrastructure: domains, inboxes, and automated DNS setup. It has no sequencer, CRM, or unified inbox, so you still need separate sending software even after buying every Mailforge mailbox available.

Can you plug Mailforge mailboxes into Instantly?

Yes. Mailforge inboxes work with any sending software that accepts SMTP connections, including Instantly. Some teams use Mailforge purely for cheap shared-IP mailboxes and run sequences through Instantly instead.

What's the difference between Mailforge and Infraforge?

Mailforge runs shared IPs at $2-$3 per mailbox/month. Infraforge, a related product, runs dedicated IPs with pre-warmed mailboxes and an API at $3-$4 per mailbox/month. Infraforge is still infrastructure only, not a sequencer or CRM.

Is Instantly or Mailforge cheaper for 30 mailboxes?

At 30 mailboxes sending 40 emails a day on a yearly plan, Instantly is cheaper if you have no existing sending software at all. Mailforge is cheaper only if you already pay for a sequencer and just need low-cost shared-IP inboxes to feed it.

If picking between a platform tool and an infra-only tool feels like one more decision you didn't need, Modern Inbound's setup offer handles domains, 20 mailboxes, warmup, and infra so you don't have to choose. It runs ₹50,000/month (₹45,000/month quarterly), or $500/$450 USD.