OKZest compared
Take a look at OKZest versus the competition and learn how awesome we are.
Lemlist is a powerful cold email tool with image personalization built in. OKZest is a dedicated image generation platform - with a full API, visual editor, and dynamic URLs for any channel you send to.
Lemlist is an all-in-one cold email platform. It combines email automation, deliverability optimization, and built-in personalization features—including dynamic image generation. For sales teams running cold email campaigns, Lemlist is a complete solution: write email sequences, automate follow-ups, track opens and clicks, and embed personalized images in your outreach—all from one platform.
The Lemlist workflow is intuitive: set up campaigns, define your email sequences, add personalized images directly within Lemlist, and automate delivery. It's powerful for teams that want everything in one tool and don't need multi-channel flexibility. Many sales teams love Lemlist's simplicity and complete feature set.
However, this all-in-one approach creates vendor lock-in. Your personalized images live in Lemlist. If you ever want to switch email platforms—say, moving from Lemlist to Mailchimp, HubSpot, or another ESP—you lose your personalization capabilities. Your images don't come with you. You'd need to rebuild in the new platform's image tool (if it even has one).
OKZest solves this problem with true platform independence. OKZest generates personalized images that work with any email platform. Your images are yours, not locked into a proprietary system. Whether you use Lemlist, Mailchimp, HubSpot, Klaviyo, or a platform that doesn't exist yet, OKZest images work everywhere through dynamic URLs.
Additionally, OKZest works beyond email. Your personalized images can be used in SMS, landing pages, web applications, social media posts, or anywhere else. With Lemlist, your images only work in cold email. OKZest is multi-channel.
OKZest also gives you a dedicated visual editor and full API access. You're not constrained by Lemlist's pre-built image templates. You design exactly what you need, and your developers can integrate with the REST API for even more advanced workflows.
Lemlist's free plan is also limited to trial mode—you pay quickly. OKZest's free plan includes 2,500 personalized images per month indefinitely. You can run small campaigns for free, forever.
If you want an all-in-one cold email tool and you're committed to Lemlist long-term, Lemlist works fine. But if you value flexibility, multi-channel capability, and the ability to own your personalization layer independent of your email platform, OKZest is the smarter investment.
| Feature | OKZest | Lemlist |
|---|---|---|
| Multiple merge tags per image (name, date, location…) | Basic | |
| Fallback text for missing or empty merge tag data | ||
| Dynamic background images swapped per recipient | ||
| Live website screenshot capture as an image layer | ||
| Visual drag-and-drop design editor | Limited templates | |
| Team workspace & multi-user collaboration | ||
| REST API for programmatic image generation | ||
| ESP-ready dynamic image URLs (no file downloads) | ||
| Free plan — no credit card required | ||
| Transparent, usage-based pricing | Seat-based |
Lemlist's personalization is built around cold outreach sequences. OKZest generates personalized images for any channel - broadcast email, transactional messages, social ads, landing pages, and more.
Generate images programmatically with a clean REST API. Pass your merge tag values and get a rendered image URL back. Lemlist has no standalone image generation API.
Insert a dynamic image URL into Mailchimp, Klaviyo, HubSpot or any ESP with one line of HTML. Each recipient gets their own personalized version - not just in cold email sequences.
If a merge tag has no value for a given recipient, OKZest falls back to default text gracefully - so no broken or empty images ever reach your audience.
Marketers can build and edit templates without touching code. Developers get the same power via a clean REST API. Both workflows live in one platform.
The free plan includes 2,500 watermarked images per month for testing - no credit card needed. Upgrade only when you need to scale.
Generate personalized images for any channel - email, social, ads - with a free plan and no credit card required.
Free plan includes 2,500 watermarked images/month · No credit card required
Take a look at OKZest versus the competition and learn how awesome we are.