Reply.io vs Warmup Inbox

Two Outbound tools side by side: what each does, what it costs and who it suits.

The verdict Side by side Plans and pricing Who each is for Other options

The verdict

On the data we hold, Reply.io comes out ahead. Here is why, point by point.

What the data says

Both cover 2 of the 2 features we compared.
Warmup Inbox starts lower, at $15/mo against $49/mo.
Only Reply.io has an MCP server, so an AI employee can work in it directly.
In our Outbound ranking, Reply.io places 4 and Warmup Inbox 6 of 33.

Side by side

Reply.io and Warmup Inbox compared
6 points compared	Reply.io	Warmup Inbox
Starts at	$49/mo	$15/mo
Free plan	No	No
API	Yes	Yes
MCP server	Yes	No
Built-in email warmup	Yes	Yes
Built-in outreach (sequences/dialer)	Yes	Yes
Links	Visit	Visit

Plans and pricing

Reply.io

Email VolumeFrom $49 per month billed annually for 1,000 active contacts; unlimited users and mailboxes; the monthly price scales with contacts.$588/yr
MultichannelPer user: $99 monthly or $89 per user per month billed annually; email, LinkedIn, calls and SMS.$99/mo/seat
Jason AI SDRFully automated AI SDR from $500 per month.$500/mo

Warmup Inbox

BasicPer inbox per month; 75 warm-up messages a day. Volume discounts as you add inboxes.$15/mo
ProPer inbox per month; 250 warm-up messages a day plus custom templates and scheduling.$49/mo
MaxPer inbox per month; 1,000 warm-up messages a day plus API access and premium support.$79/mo

Prices as the vendors list them. They change often; the final price is on their sites.

Who each is for

Choose Reply.io if…

B2B sales teams, SDRs and founders running outbound across email, LinkedIn, calls and SMS who want one tool to sequence the touches, handle replies and keep a record of every prospect.

Visit Read the review

Choose Warmup Inbox if…

Sales, SDR and agency teams about to send cold email from new mailboxes, who need those mailboxes warmed up and monitored so campaigns reach the primary inbox.

Visit Read the review

Other options worth a look

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Identifies website visitors by company and provides EU-based B2B contact data with buyer intent signals.
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Hunter
Finds and verifies professional email addresses and sends cold email sequences from one workspace.
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