Deliverability — whether your emails actually reach the inbox rather than spam or promotions folders — depends on a combination of platform infrastructure and your own sending practices, making platform comparison alone an incomplete picture worth understanding fully.
The platform you choose matters for deliverability, but it is not the whole story — a poorly maintained list on the best platform will still land in spam, while a well-maintained list on a solid platform will generally perform well regardless of minor platform differences.
SendGrid and Mailjet, given their transactional email heritage, generally maintain strong sender reputation infrastructure, while established marketing-focused tools like ActiveCampaign and Klaviyo also maintain solid deliverability track records for marketing sending specifically.
For high-volume senders, yes, generally, as it isolates your sender reputation from other users on shared infrastructure — smaller senders often benefit more from a well-managed shared IP.
Significantly — per our list hygiene guide, poor list hygiene can undermine even the best platform's deliverability infrastructure.
It is an important factor, but should be weighed alongside automation needs, cost and feature fit rather than treated as the sole deciding factor.
If you want help evaluating and improving your email deliverability, talk to our team.
Evaluate a tool's deliverability based on its infrastructure investment and sender reputation management practices, not marketing claims alone — your own list hygiene and sending practices remain at least as influential as the platform choice itself.
Written by Fibvo — Bengaluru and Erode, India — working with clients in other time zones. Questions, or think we have it wrong? Tell us.
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