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Reply.io vs Seamless.AIwhich AI sales agent should you pick in 2026?

Reply.io

AI sales engagement — multichannel sequences, Jason AI SDR, and inbox-warming for outbound at scale.

💼SalesSemi-autonomousFreemium · from $59
Tool useMemoryVoice
Seamless.AI

Real-time sales-intelligence agent that builds verified prospect lists with emails and direct dials.

💼SalesSemi-autonomousFreemium
Tool useMemory

Reply.io vs Seamless.AI — specs

SpecReply.ioSeamless.AI
Agent Rank75 / 100 (A)60 / 100 (B)
AutonomySemi-autonomousSemi-autonomous
PricingFreemium · from $59Freemium
Open sourceNoNo
CapabilitiesTool use, Memory, VoiceTool use, Memory
Integrations6 apps4 apps
VerifiedVerifiedVerified
ReleasedSep 2025May 2026

Categories: Reply.io → Sales · Seamless.AI → Sales

Agent Rank breakdown

Reply.io
Agent Rank
75/ 100
AA-tier
Autonomy
8
Capabilities
6
Integrations
8
Pricing
6
Polish
7
Verifiability
10

Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?

Seamless.AI
Agent Rank
60/ 100
BB-tier
Autonomy
8
Capabilities
4
Integrations
6
Pricing
5
Polish
6
Verifiability
7

Auto-computed from autonomy, capabilities, integrations, pricing, maturity and editorial verification. Updated every deploy. How is this computed?

Pros & cons

Reply.io
Pros
  • +Inbox warming is bundled — saves $10-30/mo vs Lemlist + Mailtoaster separately
  • +Jason AI SDR can run sequences autonomously, including reply handling
  • +Multichannel (email + LinkedIn + calls) in one UI, no swiveling
Cons
  • −UI denser than Lemlist — steeper learning curve
  • −AI SDR Jason is expensive on top of base plan
  • −CRM integrations less polished than Outreach/Salesloft enterprise tier
Seamless.AI

Pricing

Reply.io
Free
Free
Trial
  • +200 monthly emails
  • +Email sequences
  • +Inbox warmup
Email Volume
$59/seat/mo
Email-first reps
  • +Unlimited sending mailboxes
  • +1,000 active contacts
  • +AI Email Assistant
Recommended
Multichannel
$99/seat/mo
Outbound teams
  • +LinkedIn automation
  • +Calls + SMS
  • +AI Jason SDR (limited)
Agency
$166/seat/mo
Lead agencies
  • +Up to 5,000 active contacts
  • +White label
  • +API access
Seamless.AI

Which one should you pick?

Reply.io

Pick Reply.io if cost is the main constraint.

Try Reply.io →
Seamless.AI

Pick Seamless.AI if its specific capabilities (Tool use, Memory) match what you need.

Try Seamless.AI →

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Frequently asked

Should I pick Reply.io or Seamless.AI in 2026?+

Pick Reply.io if cost is the main constraint. Pick Seamless.AI if its specific capabilities (Tool use, Memory) match what you need. Most working teams running both can use Reply.io for primary work and Seamless.AI for the workflows where its specific strengths matter.

What's the price difference between Reply.io and Seamless.AI?+

Reply.io starts at Freemium · from $59; Seamless.AI starts at Freemium. Reply.io is the cheaper entry option. For team deployments the TCO can differ — use the AI Agent Rank TCO calculator for your specific volume.

Which is more autonomous, Reply.io or Seamless.AI?+

Both Reply.io and Seamless.AI are Semi-autonomous agents — neither has a meaningful autonomy advantage over the other. The decision should hinge on capabilities and pricing instead.

Readers comparing Reply.io and Seamless.AI also picked

Adjacent agents in the same category with overlapping capabilities — worth a side-by-side glance before you commit.

See more alternatives: alternatives to Reply.io · alternatives to Seamless.AI
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Reply.io vs Seamless.AI (2026): which AI sales agent wins? · AI Agent Rank