Alternatives

Products that do what ResonantMail does

Email that connects. Smart delivery for messages that matter

1
Boomerang Respondable▲687
Write perfect emails with Artificial Intelligence
2016 · boomeranggmail.com
2
Success.ai▲364
Supercharge your growth with AI-powered cold emails
2023
3
AgentMail▲275
Email Inboxes for AI Agents
Apr 2026 · agentmail.to
4
Mailgo▲470
AI-powered cold email platform that boosts deliverability
2025
5
Warmy.io▲417
Boost your email deliverability with an AI driven algorithm
2024
6
MailTester.AI▲328
Forward an email and get an AI deliverability report in 30s
Oct 2025
7
Touch AI▲248
AI email for sales
2024
8
new.email by Resend▲258
Build cross-platform emails using natural language.
2025
9
AI Sales Email Assistant by Reply▲342
Generate human-like emails and follow-ups with GPT-3
2021
10
MailAdept by mailwarm▲287
AI Agents & Email deliverability experts on your team
Jul 2026 · mailadept.com
11
Dreamlit AI▲298
Vibe code email automation using plain english
Oct 2025
12
Mailivery▲251
Reach the inbox, not the spam folder
2021
13
AI Emaily▲165
Your AI inbox that writes like you + replies on autopilot
Jul 2026 · aiemaily.com
14
Atomic Mail Agentic▲268
Let your agents read, send, and react to email autonomously
Jun 2026 · atomicmail.ai
15
Reply 2.0▲230
Automate your personal emails + calls + tasks
2019
16
superReply▲119
No more typing, no more stress - let AI handle your emails
2023
17
SmartWriter▲245
Scale with AI-personalised cold emails
2021
18
Outboundly.ai▲190
AI-powered cold outreach platform
2023
19
Warmer.ai▲212
Generate personalized emails in seconds, written by AI
2021
20
EzMail.AI▲115
Reply to emails 10X faster with pre-filled drafts by AI
2023
21AE
AgentMail – Email infra for AI agents▲121
Hey HN, we're Haakam, Michael, and Adi. We're building AgentMail (https://agentmail.to/), an API to give AI agents their own email inboxes. We’re not talking about AI for your email, this is email for your AI. We started building email agents because they can converse with users in their inboxes, automate email-based workflows, and authenticate with third-party applications. Given these unique capabilities, we think email will be a core interface for agents. But we were building on top of Gmail, which was a struggle: poor API support, expensive subscriptions, rate limits,…
2025 · chat.agentmail.to
22
TextCraft AI▲181
Smart inbox, smart emails - AI at your service
2023
23
Blastable▲167
Get More Emails Inboxed Using AI
2025
24
Lightfern for Email▲160
The telepathic AI writing tool
Feb 2026 · lightfern.com

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