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Syncline
Every layer of your stack, folded onto one timeline.
Syncline replays a user session as video and the backend distributed trace and the SQL queries that ran - on one synchronized scrubber.
A customer called to say OTPs weren't reaching them. We checked the logs. Every request came in, every SMS went out, the provider said delivered. Nothing looked broken.
So we asked for a screen recording. What followed was two days of back and forth, guessing at timestamps, and jumping between two tools that don't share a clock. We got there in the end, but it should not have taken that long.
That's the part that stuck with me. The replay showed what the user did but didn't know what it called. The traces showed the calls but didn't know what the user did. The answer was sitting between the two tools, and finding it was manual work every time.
So Syncline puts them together. Video, backend trace, and the SQL, all on one scrubber. Drag to a moment and you see what the user did and what your server did at the same time. They're matched by trace ID, not by comparing timestamps and hoping.
Your backend doesn't need a Syncline SDK. If you already run OpenTelemetry, you point OTEL_EXPORTER_OTLP_ENDPOINT at us and you're done. It's open source and you can self-host the whole thing.
About Syncline on Product Hunt
“Every layer of your stack, folded onto one timeline.”
Syncline was submitted on Product Hunt and earned 9 upvotes and 1 comments, placing #29 on the daily leaderboard. Syncline replays a user session as video and the backend distributed trace and the SQL queries that ran - on one synchronized scrubber.
On the analytics side, Syncline competes within Open Source, Analytics, Developer Tools and GitHub — topics that collectively have 803.8k followers on Product Hunt. The dashboard above tracks how Syncline performed against the three products that launched closest to it on the same day.
Who hunted Syncline?
Syncline was hunted by Adithya Hebbar. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Syncline including community comment highlights and product details, visit the product overview.
Adithya Hebbar