I highly recommend Markly - Organize and inspect designs, share brands & assets across your team.

I would have said Invision in the past. But with how much Invision goes down and how buggy it is. It's really a toss-up. Depends on what you need. The whole package comes with invision. Whereas Zeplin is focused on one area and that's dev handoff.

Zeplin is more reliable

I like having Zeplin as a purely internal tool with Invision for clients. Feels nice to keep the two separate.

The mobile developers I work with like Zeplin's aggregate style guide for type styles and colors. In my experience, InVision only seems to support per-screen information.

I'm currently working with Zeplin together with about 10 other designers and 100+ developers, which is a pretty big team and we love it. Zeplin is very reliable, works fast and has great version control that is really necessary if you work with a lot of developers oversea.

I've been using [Sympli](sympli.io) and it's been great. Reasons I originally used it over Zeplin is that it supported Web as well as apps

Throwing Sympli into the ring. Some nice touches here and there, and it plugs right into Xcode or Android Studio for mobile devs.

Inspect for sure. It's all-in-one. Assets, comments, linking up screens, version control. The interface is also easier to get around (imo).

As a designer who has used both Zeplin and Invision, I am torn between these two as well.

As a front-end developer who is converting designs into code, Invision is terrible (color discrepancies in hex codes, layers panel is unnecessary, no typography/color characters), and I feel real bad for past developers I have handed off designs to.

That said, Zeplin is a great product for what it does, but workflow-wise, if you already use Invision, it adds time on top to sync screens to a separate service. This becomes draining if you factor in the value of time.

Zeplin has worked great for us. iOS, Android and web... all design specs are properly handed off (xcode, android studio, px vs pts vs sp/dp, css/html, hex vs rgb). We are excited to demo InVision's new Studio tool but so far, zeplin has us covered. You can easily organize and send links to either a web view or mac app. Saves hours of back and forth for designers, devs, and PMs

We're currently using Zeplin because inspect doesn't offer support for text styles.

But Zeplin doesn't really keep your colors and text styles in sync with your Sketch file, it's a lot of manual work for the designer.

We're looking forward tot he dev handoff implementation of abstract, because then your handoff is always in sync with your latest sketch file, and you don't have to upload your designs.

I had the same situation back then. Although I still feel sorry for the (small) Zeplin-Team I decided to move everything to InVision for now. It's easier to use it across our products/sites with different dev-teams.

Also since I use craft for prototyping in sketch it's a no-brainer because this way "Inspect" also gets it's data out of the sketch files.

Developer here: haven't used Zeplin, but InVision's been very good. The CSS generation is really good.

I can't use Zeplin at my current role because they don't offer enterprise/SSO security options (seriously, they need to get this going). Invision offers SSO and we pay for enterprise, but Inspect is pretty lame-- there are tons of issues with exporting symbols, mis-read color codes, and it loses the export prefixes/suffixes from Sketch. Not to mention it's screen by screen and their bottom navigation pane is so horrible. I just checked out Sketch Measure and it looks very promising. Would still rather use Zeplin...

It will always depends, but if you like one place for everything, you probably should strongly consider using Adobe XD, that can design, prototype and handoff all in one app.

But if you can't live without Sketch to design, Inspect from Invision works just fine, but be aware that it's not very reliable like Zeplin is for handoff, perhaps because Invision works only a web browser and Zeplin has a standalone app but doesn't have a prototype feature like Invision. Other thing to take in consideration is that Invision is way more expensive than Zeplin.

As I work for a company that doesn't allow many cloud based services, I use Sketch measure. We self host it on our server...

I've been quite happy with it, the response from devs has been great.

Zeplin's been around more than InVision and it has more features. SVG export itself is a winner. It does not show layers to developers(i dont know why invision does) so you can exclude or include any layer you want them to pick too so it is less cluttered.

Also I personally like having a native client and I really don't like InVision's bottom navigation

Inspect by Invision, because that is where we build the prototypes already in, so an extra tool makes not sense. And it skicks to the rule of one source of truth.