Growth · alternatives · 2026

24 alternatives to smtp relay service

best smtp service provider

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. smtp relay service launched in 2023; newer entries below may have overtaken it.

1
Relay: Email API with Your Own SMTP▲5
Relay Beta: Own SMTP. Ultra-fast email API.
Nov 2025 · relay.voidvalue.com · its alternatives →
2
Relay▲92
One-tap customer experience for the service industry
2020 · its alternatives →
3
Firefox Relay▲252
Hide your real email address to help protect your identity.
2021 · its alternatives →
4
Gmail Transactional Email Relay by GMass▲79
A free service to send transactional emails through Gmail
2022 · its alternatives →
5
Relay Channel Manager▲63
Manage hundreds of Slack customer channels effortlessly
2023 · its alternatives →
6
Shortwave▲299
Email smarter & faster with a reinvented Gmail experience
2022 · its alternatives →
7
SocLeads 3.0▲573
Scrape emails from socials and maps by location
May 2026 · socleads.com · its alternatives →
8
Super Send▲127
Automate your cold outreach via email, Linkedin and Twitter
2022 · its alternatives →
9
Relay.app Agents▲215
Build an AI team that works for you
Feb 2026 · relay.app · its alternatives →
10
Relay▲423
A diverse, context-rich second brain for SaaS startups
2022 · its alternatives →
11ST
SMTP Tunnel – A SOCKS5 proxy disguised as email traffic to bypass DPI▲140
A fast SOCKS5 proxy that tunnels your traffic through what looks like normal SMTP email, bypassing Deep Packet Inspection firewalls. How it works: - Client runs a local SOCKS5 proxy (127.0.0.1:1080) - Traffic is sent to server disguised as SMTP (EHLO, STARTTLS, AUTH) - DPI sees legitimate email session, not a VPN/proxy Features: - One-liner install on any Linux VPS - Multi-user with per-user secrets and IP whitelists - Auto-generated client packages (just double-click to run) - Auto-reconnect on connection loss - Works with any app that supports SOCKS5 Tech: Python/asyncio, TLS…
Jan 2026 · github.com · its alternatives →
12
VPS Mail Servers - Dedicated SMTP Server▲2
buy smtp server unlimited smtp relay emails using vps
2021 · its alternatives →
13
Super Send 2.0▲157
Automate cold outreach - email, Linkedin & Twitter
2023 · its alternatives →
14
Easymailing▲146
User-friendly email marketing solution
2023 · its alternatives →
15
BeeMail▲61
Awesome emails for your brand
2022 · its alternatives →
16SE
Shortwave: Enjoy Your Inbox▲224
I’m thrilled to finally be able to show everyone what we’ve been working on for the last 2 years. We’re re-inventing the email experience to help you email smarter and faster, so you can get more done, and maybe even actually enjoy your inbox. When we launched Firebase here 10 years ago, HN was tough but fair, and I expect no less this time around! I hope you’ll check out what we’ve built and share your feedback. I’ll be around here all day and am happy to answer any questions. Let us know what you think!
2022 · shortwave.com · its alternatives →
17
Adcrux▲77
Email service provider and SMTP aggregator
2021 · its alternatives →
18
RelayThat▲206
Converts brand assets to consistent into ads & social images
2019 · its alternatives →
19
ProxiedMail▲170
Email forwarding with unlimited mailboxes
2024 · its alternatives →
20FS
Fake SMTP server as a service▲149
2017 · develmail.com · its alternatives →
21
MailSlurp▲103
End-to-end email testing made easy
2018 · its alternatives →
22
Hiver 2.0▲131
Shared inbox management for teams
2019 · its alternatives →
23
Helpmonks▲87
The collaborative email platform for your team
2015 · its alternatives →
24AS
A simple SMTP proxy that bridges legacy software to modern SMTP servers▲47
2017 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →