Interspire Email Marketer vs Sendy (2026): which should you pick?

Pick Interspire Email Marketer if

• Fits if you have someone to run a Linux server and want one payment
• Works for teams that want white-labelling and unlimited contacts

Look elsewhere if

• Not for you if you want to try it free, as nothing is listed
• Skip it if you don't have someone to run PHP and MySQL
• Watch out: you supply your own SMTP or email provider, and deliverability setup is not standard
• Watch out: updates and support last a year, then renewal starts at 25% of the price
• Tight if you need more than 5 user accounts, which needs a custom licence

Pick Sendy if

• Fits if you publish to a list of tens of thousands and want to stop paying per subscriber
• Works for agencies that run a PHP host and want to give each client a branded account with its own limits

Look elsewhere if

• Skip it if the words PHP, MySQL and Amazon SES make you nervous, as you set them up
• Not for you if you want to try it first, as there's no trial, only a refund
• Tight if you run several sites, since each license covers one domain
• Watch out: major version upgrades aren't included, and the AI add-on is $39 and installation $79
• Too light for anyone wanting a phone app or a hosted service, as it runs only on your own server

Interspire Email Marketer

• It runs on your own Linux server with PHP 8.4 and MySQL 8.0+ or MariaDB 10.5+; the vendor says you need someone comfortable administering them.
• The price does not include sending: you supply an SMTP server or email provider, and deliverability setup is not part of the standard license.
• Updates and support last one year; renewal starts at 25% of the license price.
• The Self-Service License includes 5 user accounts; larger or multi-team deployments need a custom license.

Sendy

• You host it yourself on a PHP and MySQL server and need your own Amazon SES account.
• Each license covers one domain, and major version upgrades are not included.
• The AI Assistant is a $39 one-time add-on (shown cut from $49), and installation by Sendy costs $79.
• There is no free trial; Sendy offers a refund if it does not work out.

Interspire Email Marketer

Autoresponders and triggers

Time-based drip sequences and evergreen campaigns, plus triggers that fire on opens, clicks, subscriptions and segment membership.

Segmentation and list hygiene

Segments built from behavior and custom fields, double opt-in, suppression lists, and automatic removal of bounced, unconfirmed and unsubscribed contacts.

Drag-and-drop editor

A visual email editor with a bundled template library, HTML source editing, preheader text, browser previews and test sends.

Split testing

A/B tests on subject lines, content or send times.

Embeddable forms

Subscription forms that can be hosted on outside websites and landing pages while contacts are managed in Interspire.

Reporting

Open, click, bounce, unsubscribe and forward statistics, with campaign statistics exportable as CSV.

Sendy

Sending through Amazon SES

Campaigns go out through your own Amazon SES account at Amazon's rate; SendGrid, Mailjet and Elastic Email also work natively over SMTP.

Three email editors

Switch between drag-and-drop, WYSIWYG and HTML editors when building templates.

Autoresponders, rules and webhooks

Drip sequences sent at set intervals or on dates, plus rules that send notifications, fire webhooks or move subscribers when something happens.

Segments and custom fields

Build segments from any conditions, store custom fields for personalization, and include or exclude lists and segments per campaign.

White-labeled client brands

Group lists into brands and give clients their own access, permissions, sending limits and pricing.

Live reports and list cleaning

Real-time opens, clicks, bounces, complaints and locations, with bounces and complaints removed automatically.

Interspire Email Marketer

• Self-Service License$495

  one-time

  Software only, for you to install and run: 5 user accounts, unlimited contacts, emails and surveys, white-labeling, and one year of updates and email support.

• Pro Installation$695

  one-time

  The Self-Service License plus installation by the vendor on a compatible server you provide, with cron jobs set up and a test email sent through your SMTP credentials.

• ConciergeCustom

  Quoted per organization: flexible license terms, server and SMTP setup, DNS authentication, data migration, customization, training and priority support.

Sendy

• Sendy software$69

  one-time purchase, for one domain

  The self-hosted app for one domain, with free updates until the next major version. Sending through Amazon SES costs $1.6 per 10,000 emails, paid to Amazon.