
Invision
Axure
Balsamiq
Proto.io
Flinto
Webflow
Moqups
Collaboration app for UI designers & frontend developers

liteLLM
Portkey
Merlin Unified API
OpenRouter
TrueFoundry AI Gateway
VoidLLM
ZenMux
Enterprise LLM gateway and self-hosted AI platform: Chat, Code, and Agent workspaces on top of centralized access control, budgets, and usage visibility. An alternative to running LiteLLM plus custom auth, UI, and admin tooling.

Which is more popular?
Based on our record, Zeplin seems to be more popular. It has been mentioned 23 times since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | zeplin.io | secondstack.ai |
| Pricing | ||
| Platforms | — | |
| Company | Startup from the United States | Startup from the United States · 10 - 19 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Zeplin yet.
SecondStack gives an entire organization access to AI without handing its data to third-party clouds. The platform ships three end-user workspaces — Chat for everyday work, Code for engineering teams, and Agent for automation — running on top of an enterprise LLM gateway that connects to the...
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Zeplin is best suited for designers and developers working in teams where clear design specifications and organized collaboration are critical. It's particularly beneficial for teams using Figma, Sketch, or Adobe XD who want to ensure precise design implementation and reduce misunderstandings between design and development departments.
No analysis of SecondStack yet.
Walkthroughs and reviews on video.
Zeplin Basics: Design Systems
More videos
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How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Zeplin and SecondStack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


As aforementioned, Zeplin suffers some inherent drawbacks that may dent designers’ hopes for faster, easy, and reliable UI design. To avert such scenarios, you don’t have to get stuck with Zeplin as there are numerous...
Zeplin is super affordable. It offers 2 plans: Team, which costs $8.00 per user per month, and Establishment, which costs $16.00 monthly. Zeplin also provides a feature-limited Free Plan and Enterprise Plan.
Zeplin is a workspace collaboration tool to document what to build and how designs should behave in a central collaborative place for the entire dev team.
We have no reviews of SecondStack yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Tools like Zeplin's AI layer, Supernova, and the emerging generation of Figma plugins with AI backends do this today. The output is not a PDF full of screenshots. It is structured data: exact values, token references, and context — the... - Source: dev.to / 6 months ago
Zeplin.io AI-powered design-to-dev handoff. - Source: dev.to / over 1 year ago
Additionally, thank you to all our community launch partners across the frontend ecosystem for helping us bring Storybook 8 to the world! Thanks to Chromatic, Figma, ViteConf, Omlet, DivRiots, story.to.design, StackBlitz, UXpin, Nx, Mock... - Source: dev.to / over 2 years ago
Tracking SecondStack since Jul 2026.
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