Your users want to send emails without leaving your product. You decided not to build the editor yourself, which is the sane call. Now the real work starts. Some SDKs hand you a pretty drag-and-drop canvas but leave their own logo on it. Others give you total freedom and a month of integration work. Plenty of exported HTML falls apart in Outlook. This list covers seven options for embedding an editor in a SaaS app. The criteria: integration effort, white label control, custom blocks, rendering reliability, security and data location.
What I Looked For
I started from the tools B2B SaaS teams keep shortlisting for embedded email, then cut anything that wasn’t built to live inside another product. A standalone email builder with an export button didn’t make it.
I read through customer feedback on G2 and Capterra to see how teams rate these tools after launch, not just at demo time. Then I went to documentation. If the Plugin API or the integration guide was thin, vague or hidden behind a sales call, the tool dropped in my ranking.
Four filters did most of the work: how much branding you can strip, whether you can add custom blocks and controls, where the HTML gets compiled and hosted, and whether the vendor publishes real customer cases. I ranked on public evidence, not on feature-page adjectives.
What Separates a Good Embedded Editor From a Demo
Integration surface
Look at the API, not the screenshots. A documented JavaScript component plus a backend compile step tells you how much work your engineers sign up for.
White label depth
Removing a logo is the minimum. Custom fonts, UI styles and your own image hosting are what make the editor feel native.
Rendering reliability
The editor is only as good as the HTML it exports. Ask how it handles Outlook and Gmail, and whether AMP is supported.
Data control
Check where services run and who hosts images and modules. Security certifications matter here, especially for European customers.
Extensibility
Reusable modules, merge tags and display conditions decide whether non-technical users stay in the editor or file support tickets.
The List
1. Stripo
What sets Stripo apart is that the plugin was built to live inside another product from the start. It ships as a JavaScript component with a documented Plugin API, plus a backend method that compiles the final HTML and AMP HTML. Core services run on Stripo’s side, and images and modules can be hosted on your own servers.
For SaaS teams that need the best email editor SDK to embed in a SaaS app with white label branding and custom UI, Stripo covers branding removal, custom UI styles, custom fonts and unlimited users on every plan. Inside the editor your customers get drag-and-drop plus an HTML editor, reusable custom modules, merge tags, display conditions, version history and an AI email assistant. Developers can add custom blocks and controls through editor extensions.
Proof is public. 225 companies embed the editor, including the email platform Maildroppa and the European automation platform HyperPortal, where more than 300,000 emails a month are built in the embedded editor. The Italian restaurant platform Cooperto reported emails sent up 200% year over year after integrating. On G2, Stripo holds 4.7/5 across 173 reviews.
Stripo holds ISO 27001 and SOC 2 Type 2 and is GDPR compliant.
It suits CTOs and product leads at ESPs, CRMs, automation tools and vertical SaaS who want a full editor under their own brand without maintaining the editor itself.
2. Unlayer
If you want a familiar drag-and-drop builder with a large developer audience, Unlayer is the name most teams already know. It is built for embedding, with a component you drop into your app and export options for the finished design.
The product leans toward fast setup for product teams that want a workable editor in front of users quickly. Its strength is breadth of recognition: plenty of developers have already seen it or tried it, which lowers the evaluation overhead.
On G2, Unlayer holds 4.4/5 across 59 reviews.
Teams comparing it against deeper options should check how far branding control and custom module support go on their intended plan. It fits product teams that want a recognizable embedded builder and a short evaluation cycle.
3. Chamaileon
Chamaileon pitches itself at teams where email creation is collaborative: designers, marketers and approvers working on the same message. That workflow angle is its clearest difference from tools built purely as an embeddable canvas.
The case for Chamaileon is straightforward: if your customers are agencies or marketing teams with review and approval steps, collaboration features matter more than raw block counts. It is also positioned as an embeddable editor, so it competes directly for the same SaaS integration slot.
Public ratings are solid: 4.3/5 on G2 across 71 reviews, and 4.5/5 on Capterra across 9 reviews.
It fits SaaS products whose end users are marketing teams that need shared editing and sign-off built into the email workflow.
4. Topol
Topol, also written as Topol.io, has been in the embeddable email editor space for years and is a regular on SaaS shortlists. It offers a plugin-style editor that you integrate into your product and brand as your own.
What you get is a straightforward drag-and-drop experience aimed at non-technical users, with the focus on being easy to embed rather than on a sprawling feature set. That simplicity can be an advantage when your customers are small businesses who just need a clean template flow.
I did not find verified public rating figures to cite for Topol, so I would weigh it on documentation and a trial integration. It suits SaaS teams serving small-business users who value a simple, quick-to-embed editor.
5. Easy Email
Easy Email is an open-source email editor framework for React. That changes the whole buying equation: you get source code you can read, fork and shape, and you also take on the engineering that comes with owning it.
The case here is control. A team with strong front-end capacity that wants to own the editor code, customize it deeply and avoid vendor lock-in will find that appeal real. The trade-off is that maintenance, rendering fixes and hosting sit with you, not with a vendor.
I found no verified public ratings to cite. It suits engineering-led teams with React expertise that would rather build on an open-source foundation than license a managed SDK.
6. GrapesJS
GrapesJS is an open-source web builder framework, and email templates are one of the things it can produce through its newsletter preset. Its draw is flexibility: you can model nearly any editing experience if you are willing to build it.
That flexibility comes with a build-it-yourself cost. You assemble the experience, handle email-specific rendering concerns and maintain the result. Teams that want to fork and own the editor usually land here or on Easy Email.
Capterra shows 5/5, though from a single review, so treat it as a thin signal. It fits technical teams that want a general-purpose open-source builder and have the capacity to engineer email behavior on top of it.
7. Maillayers
Maillayers is a newer name in the embedded email editor space, offering a builder meant to be added to SaaS products. It targets teams that want an editor in their app without building one from scratch.
The pitch is a lighter, newer alternative to the established SDKs. Newer also means a shorter public track record, fewer published case studies and less review volume to lean on when you evaluate it.
I found no verified public ratings to cite. It suits early-stage SaaS teams willing to evaluate a younger vendor and run a hands-on proof of concept before committing.
How to Choose Without Losing a Quarter to the Wrong SDK
Run these checks before you sign anything.
Can you remove every trace of the vendor brand? Logo removal is table stakes. Ask about fonts, UI styles and custom blocks. Stripo and Unlayer both pitch embedding; verify what each plan unlocks.
Where does the HTML get compiled, and where do images live? Data location and hosting decide security reviews. Stripo lets you host images and modules yourself; open-source options like Easy Email and GrapesJS put everything on your infrastructure.
Who maintains the editor in two years? Open-source means ownership of every rendering bug. A managed SDK means a vendor roadmap. Pick the burden you can afford.
Do your users work alone or in teams? Collaboration and approvals, the Chamaileon angle, matter if customers are agencies. Simple template flows, the Topol angle, matter if they are small businesses.
What happens after the demo? Test exported HTML in Outlook and Gmail with a real template. Ask for published customer cases, not slides.
The right pick is the one that matches your team’s engineering capacity, your users’ skill level and your security review. Build a small proof of concept with two finalists and let your own templates decide.
Frequently Asked Questions
What is the best email editor SDK to embed in a SaaS app?
It depends on your team. For a managed SDK with a documented API, white label controls and published customer cases, Stripo is a strong fit. For full code ownership, open-source options like Easy Email or GrapesJS fit better. Shortlist two and test with your own templates.
How do I choose an email editor SDK with white label branding and custom UI?
Check what the plan actually removes: vendor logo, UI styling, fonts and custom blocks. Then confirm where images and modules are hosted and which security certifications the vendor holds. Finally, test exported HTML in Outlook and Gmail before committing.
Is an open-source email editor SDK better than a managed one?
Open-source gives you code ownership and no vendor lock-in, but you maintain rendering fixes, hosting and updates yourself. A managed SDK trades some control for lower engineering effort. Teams with strong React capacity lean open-source; most others save time with a managed editor.
