Growth · alternatives · 2026

24 alternatives to SparkPost Signals

Predictive email intelligence and deliverability analytics

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. SparkPost Signals launched in 2019; newer entries below may have overtaken it.

1. 1
   SendGrid Email Analytics by Keen IO▲201

   Detailed email reporting that drives results

   2017 · keen.io · its alternatives →

2. 2
   MailAdept by mailwarm▲274

   AI Agents & Email deliverability experts on your team

   Jul 2026 · mailadept.com · its alternatives →

3. 3
   Sparkbase▲676

   Book high-intent sales calls on autopilot

   2024 · sparkbase.ai · its alternatives →

4. 4
   Mailwarm 2.0▲676

   The email warmup tool, upgraded for deliverability.

   Jun 2026 · mailwarm.com · its alternatives →

5. 5
   Mailgo▲469

   AI-powered cold email platform that boosts deliverability

   2025 · mailgo.ai · its alternatives →

6. 6
   Newsletter Radar by SparkLoop▲400

   Match with relevant newsletters & grow faster together, free

   2024 · sparkloop.app · its alternatives →

7. 7
   Kasplo Email Intelligence▲98

   Predict, Optimise, and Outperform

   2025 · kasplo.com · its alternatives →

8. 8
   Email Deliverability Booster▲385

   Reach every lead, every time

   2024 · snov.io · its alternatives →

9. 9
   Spark for Mac▲1,058

   Beautiful and intelligent email app

   2016 · sparkmailapp.com · its alternatives →

10. 10
    MailTester.AI▲327

    Forward an email and get an AI deliverability report in 30s

    2025 · mailtester.ai · its alternatives →

11. 11
    Warmy.io▲417

    Boost your email deliverability with an AI driven algorithm

    2024 · warmy.io · its alternatives →

12. 12
    Sparkpost▲6

    Email delivery service for senders of any size

    2016 · bird.com · its alternatives →

13. 13
    Upscribe▲604

    Email marketing & embeddable opt-in forms

    2016 · upscribe.net · its alternatives →

14. 14
    Boomerang Respondable▲687

    Write perfect emails with Artificial Intelligence

    2016 · boomeranggmail.com · its alternatives →

15. 15
    Unspam.email▲299

    Email spam checker and newsletter heatmap prediction.

    2020 · unspam.email · its alternatives →

16. 16
    SparkLoop▲350

    The first referral tool for newsletters

    2020 · sparkloop.app · its alternatives →

17. 17
    Unlimited Email Tracker▲496

    Track opens and clicks, set reminders and delays in Gmail

    2019 · snov.io · its alternatives →

18. 18
    Mailmodo AI▲471

    Try this AI email marketing tool to create emails, automate journeys, and add interactivity to drive better conversions.

    2025 · mailmodo.com · its alternatives →

19. 19
    Growbots Email Timing Optimizer▲437

    Find the perfect time to send your email

    2017 · growbots.com · its alternatives →

20. 20
    Recipient Validation▲20

    Data-driven email validation powered by SparkPost.

    2019 · bird.com · its alternatives →

21. 21
    All-new Spark▲345

    Smart. Focused. Email

    2022 · sparkmailapp.com · its alternatives →

22. 22
    Sparksocial▲345

    AI powered social listening and outreach for lead generation

    2024 · zovo.ai · its alternatives →

23. 23
    Mailcastr▲363

    Create email signature that can track your emails

    2017 · bulletbusiness.com · its alternatives →

24. 24
    Email Warm-Up by Snov.io▲345

    Warm up your email to boost deliverability and get replies

    2022 · snov.io · 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 →