Alterable

Overview

Alterable is an email-content tool that redraws tagged images when a recipient opens a message. It suits email marketers who need deadlines, imagery, or product details to respond to changing context. Its focus is deliberately narrow: personalization for email, not a cross-channel system.

Key features

Teams build content in a browser, then paste an image tag into an email campaign. The image is rendered again at each open, supporting countdowns, personalized images, dynamic products, local maps, surveys, and scratchers. Alterable says this approach works with platforms including Klaviyo, Mailchimp, HubSpot, Brevo, GetResponse, Constant Contact, and Omnisend, so teams can add changing content without replacing their email platform.

Countdowns can use fixed dates, evergreen deadlines, or merge-tag deadlines, and stop at zero when the deadline passes. A no-code rules builder selects image variations using signals such as location, device, language, weather, temperature, time of day, date, and query parameters. That gives marketers room to tailor an image to its recipient or timing; it remains a rule-driven email feature rather than broader personalization across channels.

Dynamic product content can show current prices and stock levels, with product matching, swapping, and low-stock warnings. Alterable says the content uses standard email images without JavaScript and leaves sender domains and SPF, DKIM, and DMARC authentication unchanged. These are relevant assurances for email teams, though the privacy policy also says absolute security cannot be guaranteed.

Pro and Scale include API and MCP server access, with MCP clients connecting by API token or OAuth. Zapier integration is marked beta on both plans, so teams depending on that connection should account for its beta status.

Pricing

Engage is free forever, requires no credit card, and includes 10,000 impressions per month. It caps local maps at 10 locations, limits scratchers to a single prize, and allows one rule-based version per image or product; basic analytics and self-serve support round it out. It is a sensible starting point for small campaigns, but the monthly impression ceiling and constrained variants make it less suitable for sustained, larger-volume use. There is no free trial because the free plan is ongoing.

Pro costs $49 a month and includes 500,000 impressions, A/B testing, API and MCP access, beta Zapier integration, and priority email support with responses within 24 hours. Overage impressions cost $1.00/1k. It fits growing teams that need testing and integrations, but sends above the quota add cost.

Scale costs $199 a month for 2,500,000 impressions, advanced analytics, API and MCP access, beta Zapier integration, and dedicated support with responses within 8 hours. Overage impressions cost $0.80/1k, making the higher quota and lower overage rate more relevant to high-volume senders than smaller teams.

Enterprise has custom pricing for businesses with large sending volume or unique business models. It adds integration assistance, an account manager, volume discounts, and dedicated support. For every plan, a loaded service view counts as an impression. Engage has no overage billing; once its monthly limit is reached, editing pauses until reset or upgrade.

Platforms

Alterable supports web and API, with email as its supported channel. The browser-based build-and-paste workflow suits teams already using compatible email platforms, but not buyers seeking native personalization across other channels.

Who it's for

Choose Alterable if email campaigns need open-time countdowns, context-sensitive images, or current product information and the team can work within impression quotas. It is a weaker fit for organizations seeking personalization beyond email, or for free users whose sending volume regularly exceeds 10,000 monthly impressions.

Pros and cons

• Pro: Images can respond to a broad set of rules and product conditions, making timely, audience-specific email content possible.
• Pro: The free-forever Engage plan offers a no-card way to begin, while Pro and Scale add API and MCP access.
• Con: The service is email-only, so it does not cover teams looking for one personalization system across channels.
• Con: Engage's impression ceiling pauses editing rather than allowing overages, and its rule-based variants are limited to one per image or product.

Alternatives

Browse Email Personalization Software for more options in the category.

Pick Recombee instead when recommendation requests and catalog interactions are the priority: its free plan covers fewer than 100,000 interactions and recommendation requests per month, plus fewer than 20,000 active users and catalog items.

Personyze is another freemium option; its free plan covers 5k pageviews, one domain, three active campaigns, eight AI tasks a month, and email support.

For a store with up to 50 orders on the free plan, Wiser AI is an alternative; its paid 51–100 orders tier costs $9 a month.

Constructor uses custom enterprise pricing, while Athos Commerce Personalization offers a standalone annual Onsite Discovery plan with search, merchandising, and personalization.

DYMATRIX Web Analytics and VueModel are other paid options. Bloomreach Content is a paid option without a free plan.

Verdict

Alterable is a good fit for email teams that want content to change at open time, especially when deadlines, product stock, or recipient context matter. Its browser-to-image-tag workflow and generous paid impression quotas are the main reasons to choose it; the email-only scope and Engage's hard monthly cap are reasons to look elsewhere.