The verdict
On the data we hold, Seamless comes out ahead. Here is why, point by point.
What the data says
- Only Seamless has a free plan to start on.
- Reply.io starts lower, at $49/mo against $147/mo.
- Both have an API and an MCP server, so either works with AI employees.
- In our Outbound ranking, Seamless places 25 and Reply.io 4 of 33.
Side by side
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
SE
Seamless
- Freeindividuals testing outreachFree
- Basicsolo reps needing monthly credit refresh$147/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.
Other options worth a look
Tool·Client acquisitionRuns multichannel cold outreach with built-in email warmup, lead database, and deliverability scoring.Outbound
From $55/mo yearlyAffiliate link
Tool·Client acquisitionFind B2B prospects and run email and phone outreach campaigns from one unified platform.Outbound
From $49/moFree planAffiliate link
Tool·Client acquisitionSends high-volume cold email across multiple mailboxes with automated warmup and a unified reply inbox.Outbound
From $85/mo yearlyAffiliate link
Tool·Client acquisitionRun cold email outreach at scale with unlimited mailboxes, warm-up automation and lead verification.Outbound
From $32/mo yearly
Tool·Client acquisitionBuilds sender reputation for new email accounts by warming them through a network of real inboxes.Outbound
From $15/mo- Tool·Client acquisitionIdentifies website visitors by company and provides EU-based B2B contact data with buyer intent signals.
Outbound
From €79/mo yearlyFree planAffiliate link