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Alterable
Claymont, Delaware, USA
What it is
Alterable creates email content that updates when a recipient opens a message. Build content in a browser, then add an image tag to an email campaign; the image is rendered again at each open. Available content includes countdowns, personalized images, dynamic products, local maps, surveys, and scratchers. Countdown timers can use fixed dates, evergreen timing, or merge-tag deadlines, and stop at zero after the deadline. A no-code rules builder can choose image variations based on factors such as location, device, language, weather, temperature, time, date, and query parameters. Product content can display current prices and stock levels, with options for product swapping, matching, and low-stock warnings. Alterable says its image-tag approach works with email services including Klaviyo, Mailchimp, HubSpot, Brevo, GetResponse, Constant Contact, and Omnisend. Engage is free forever with 10,000 impressions per month and no credit card requirement. Pro costs $49 a month; Scale costs $199 a month. Pro and Scale include API and MCP server access.
For and against
For
- Engage is free forever and includes 10,000 monthly impressions.
- Content includes countdowns, surveys, maps, and scratchers.
- Rules can use location, device, weather, and other factors.
- Product content can show current prices and stock levels.
- Pro and Scale include API and MCP access.
Against
- Engage editing pauses at its monthly impression limit.
- Pro and Scale charge $49 and $199 a month.
- There is no free trial.
- Engage has no overage billing.
The verdict
Alterable combines open-triggered email content with rules-based image variations and dynamic product details. The free Engage plan has a 10,000-impression monthly limit, while higher plans add capacity and support or integration options.
Who it suits
Alterable suits email teams that want message content to change based on recipient context or product availability. The listed plans also address growing teams, high-volume senders, and businesses with large or unusual sending needs.
Plans and prices
Engage
10,000 impressions/mo · Local maps up to 10 locations · Scratchers single prize · 1 rule-based version per image or product
Read 30 Sep 2026 · alterable.com
Pro
500,000 impressions/mo · A/B testing · API + MCP server access · Zapier integration (beta)
Read 30 Sep 2026 · alterable.com
Scale
2,500,000 impressions/mo · Advanced analytics · API + MCP server access · Zapier integration (beta)
Read 30 Sep 2026 · alterable.com
Enterprise
For businesses with large sending volume or unique business models · Integration assistance · Account manager · Volume discounts
Read 30 Sep 2026 · alterable.com
On the record
- API and MCP
- Pro and Scale plans include API and MCP server access, and the MCP server page says clients connect using an API token or OAuth.alterable.com · read 30 Sep 2026
- Countdown timers
- Timers support fixed-date, evergreen, and merge-tag deadlines, and stop at zero when the deadline passes.alterable.com · read 30 Sep 2026
- Dynamic images
- A no-code rules builder can select image variations using factors such as location, device, language, weather, temperature, time of day, date, and query parameters.alterable.com · read 30 Sep 2026
- Dynamic products
- Dynamic product content can show current prices and stock levels, and the page describes product swapping, product matching, and low-stock warnings.alterable.com · read 30 Sep 2026
- Email deliverability
- Alterable says its content uses standard email images without JavaScript and does not change the sender’s domain or SPF, DKIM, or DMARC authentication.alterable.com · read 30 Sep 2026
- Email integrations
- Alterable says its image-tag approach works with email platforms including Klaviyo, Mailchimp, HubSpot, Brevo, GetResponse, Constant Contact, and Omnisend.alterable.com · read 30 Sep 2026
- Free access
- The Engage plan is free forever, includes 10,000 impressions per month, and requires no credit card; the home page says there is no trial or time limit.alterable.com · read 30 Sep 2026
- How it works
- Users build content in a browser and paste an image tag into an email campaign; the image is rendered again at each open.alterable.com · read 30 Sep 2026
- Impression limits
- A loaded service view counts as an impression; Engage has no overage billing, and editing pauses after its monthly limit until reset or upgrade.alterable.com · read 30 Sep 2026
- Security and privacy
- The privacy policy says Cloudflare processes log data for hosting and security and that Alterable uses commercially reasonable security practices, while noting it cannot guarantee absolute security.alterable.com · read 30 Sep 2026
- Support
- Engage is self-serve, Pro offers priority email support with responses within 24 hours, and Scale offers dedicated support with responses within 8 hours.alterable.com · read 30 Sep 2026
- What it does
- Alterable generates email content when a recipient opens a message, including countdowns, personalized images, dynamic products, local maps, surveys, and scratchers.alterable.com · read 30 Sep 2026
- Who it is for
- The pricing page describes Pro for growing teams, Scale for high-volume senders, and Enterprise for businesses with large sending volume or unique business models.alterable.com · read 30 Sep 2026
