Self-Hosted Email Marketing Software You Own
One-time license. No monthly fees.
✓ Your server = your limits
✓ No per-contact pricing
✓ Yours forever
Trusted since 2003
Email marketing on your terms
Create professional emails in minutes
Integrate with your applications with our powerful API
Capture leads anywhere with embeddable forms and spam protection
Maintain a list hygiene with automatic bounce processing
Personalize your campaigns with custom fields and segmentation
Build advanced automations with triggers and autoresponders
Run on your own infrastructure with full control over your data and environment
Optimize messaging with A/B testing for best results
Monitor performance with real-time reporting
Our Customers
Love Us
“Our monthly email newsletter is a breeze with the simple-to-use template and contact list creation system. You can use the built-in templates or create your own. Photos are a snap to upload. Anyone can use the simple editor. You can easily segment lists, schedule campaigns. The stats are readily available … opens, clicks, shares, etc.”
Carolyn Worthington
Publisher, Healthy Aging® Magazine
Built to work the way your business works
Run email marketing on your own infrastructure or with your preferred sending provider. Interspire gives you the flexibility to design campaigns, automate workflows, and manage data without being tied to a platform’s limits.
Interspire Email Marketer at a Glance
Frequently Asked Questions
Your license is perpetual. The version you purchase is yours to use forever, with no subscription fees. Maintenance renewal is optional. It gives you access to new versions, security patches, and our support desk. If you don’t renew, your software keeps working. You just won’t receive updates.
Your software keeps working. There’s no lockout, no disabled features, and no penalty. You simply won’t receive new updates or access to our support team. You can renew anytime if you decide you want updates later.
No. Interspire runs entirely on your server. License verification is self-contained, and there’s no connection to a remote license server required. Your installation is fully independent.
There are no caps and no extra charges based on the number of contacts you have or emails you send. Your only limits are your server’s capacity.
No. With an optimized setup, you can send over 100,000 emails per hour. Your only constraints are your server resources and your SMTP provider’s limits, not ours. See our guide on factors that affect email send rates.
Interspire includes built-in tools to help: an integrated spam checker, automatic bounce processing, and list hygiene features. Deliverability also depends on your sending practices and infrastructure. See our comprehensive guide for best practices.
Interspire runs on Linux with a standard LAMP or LEMP stack (Apache/Nginx, PHP 8.3, MySQL/MariaDB). See detailed requirements here.
Yes. You can view and modify the source code, except for the license verification system. We can’t provide support for custom modifications, and changes you make may not be compatible with future updates.
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