Growth · alternatives · 2026

24 alternatives to COSLR

Find, e-mail & convert customers in minutes- with 1 platform

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. COSLR launched in 2022; newer entries below may have overtaken it.

1. 1
   Sender▲297

   Super easy and affordable email marketing platform

   2021 · its alternatives →

2. 2
   Maillayer▲462

   Send email campaigns via Amazon SES with NoCode

   2024 · its alternatives →

3. 3
   10xBeast▲270

   Customized email campaigns for outbound B2B sales teams

   2024 · its alternatives →

4. 4
   Corrily▲193

   Price localization and optimization for SaaS companies

   2021 · its alternatives →

5. 5BA
   Built an email marketing platform after paying $230/month▲44

   Spent the last month building Fertit - basically a newsletter manager but you bring your own SMTP and skip the DevOps nightmare. All the features (subscriber management, admin dashboard, custom preferences) without the infrastructure markup. The math that broke me: Mailchimp: $230/month for 15k contacts My solution: $10/month infrastructure + $10 SendGrid = unlimited What I learned: The "enterprise" features are mostly database operations with SMTP APIs. But the 3 weeks of Go/PostgreSQL/Redis setup explains why people just pay ConvertKit $300/month. Here's the thing:…

   2025 · fertit.com · its alternatives →

6. 6
   Sales CRM by Cooby▲130

   Build mobile sales engines for WhatsApp without spreadsheets

   2021 · its alternatives →

7. 7
   Salesrobot▲221

   Tried sending cold emails and failed, let this robot do it

   2023 · its alternatives →

8. 8
   LeadScout▲91

   300+ leads for SaaS companies, right to your inbox

   2023 · its alternatives →

9. 9
   Email2Go▲143

   HTML email templates builder and preview tool

   2020 · its alternatives →

10. 10
    The Top EP 528: ConvertKit Hits $480k MRR, Helping 10,000 Bloggers Grow Email Lists with CEO Nathan Barry▲72

    ConvertKit hits $480k MRR helping bloggers grow email lists

    2017 · its alternatives →

11. 11IM
    I made an open source Mailchimp RSS-to-Email alternative▲109

    Hi all! Excited to share rss2newsletter after completing dev work for the initial release. The idea for this project came out of necessity, as I wanted to share my articles via email newsletter. I was looking for a super minimal, lightweight, and open source solution, and when none existed, I decided to create one. For any sizable number of email recipients, a popular platform like Mailchimp will easily cost you hundreds or even thousands per month in per-contact fees. rss2newsletter, on the other hand, allows you to use Amazon SES, so you can reach your audience at pennies on the dollar.…

    2024 · github.com · its alternatives →

12. 12
    EmailWritr▲95

    Create high converting email sequences with a few clicks

    2021 · its alternatives →

13. 13
    Outreach Automation for Salespeople by Close.io▲116

    Predictive Dialing and Email Sequences built into your CRM

    2018 · its alternatives →

14. 14
    AraMailer▲79

    Powerful email marketing software to get more sales & clicks

    2021 · its alternatives →

15. 15OS
    Open-source email helpdesk▲42

    We've tried systems like OSTicket, OTRS etc, but never found anything to our liking. Most systems were cluttered, slow or too advanced. Brimir is simple but usefull.

    2013 · github.com · its alternatives →

16. 16
    Outsell.ai▲71

    Free email verification for Salesforce

    2020 · its alternatives →

17. 17
    Icy Leads▲10

    Get Unlimited B2B Leads For Only $99/mo.

    2020 · its alternatives →

18. 18
    Seer▲15

    Helping retail salespeople sell more using email and SMS

    2021 · its alternatives →

19. 19
    JustCall AI SDR▲29

    Go from send to scheduled meetings, 24/7

    Nov 2025 · justcall.io · its alternatives →

20. 20
    LunarSales▲14

    Pay only for qualified meetings - on-demand sdr platform

    2025 · its alternatives →

21. 21
    Marketeze.ai▲23

    AI marketing platform for small businesses from £49/mo

    Nov 2025 · marketeze.ai · its alternatives →

22. 22
    LeadsBlue Email Finder Tool▲12

    One-click website email extractor for Chrome & Firefox.

    Oct 2025 · its alternatives →

23. 23
    LeadGuide▲18

    Sales Copilot built for authentic relationships, not spam.

    Jul 2026 · leadguide.app · its alternatives →

24. 24
    Zipplead▲18

    Lead generation software

    2025 · zipplead.com · its alternatives →

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 →