SenseDefend

Synthetic-media instruments, by article and effective date

Synthesia and HeyGen on stating the conditions for a mark

Both sell synthetic presenters and both apply a visible mark to some output. One page explains the circumstances under which it appears; the other lists the tiers at which it does not. As of 2026-09-22.

Conditions against a price, on the same layerOne page explains the circumstances under which a mark appears, including a flag set in code, and leaves the list open. The other lists the tiers at which removal is included and stops.The planNamed on bothpages as a causeor a cure forthe markVisible on aninvoiceA test flagNamed on onepage only, setin code bywhoeverintegratedVisible nowhereAn open listOne page hedgesthat these areexamples, notthe whole setRecorded as ahedgeA finished fileOne page says amark applied intest mode stayson it
Fig. 1 The tidier cell is only tidier because less was published about it.
Synthesia and HeyGen on the same column, point by point. Recorded 2026-09-22.
PointSynthesiaHeyGen
What the page statesThe mark appears under certain conditions, including test modeRemoval is listed on the $29 and $49 tiers
Causes namedTwo, and the list is left openOne, and it is a purchase
How a finished file is fixedUpgrade and generate the video againNot addressed

Inclusion rule. Two entries whose published answers to one column pull in different directions. Cells hold each vendor's own wording from the page its entry names; pairs that agree on the column are not filed at all. Order. Fixed order, and the two columns are in the order the heading gives them.

1Conditions are harder to tabulate and closer to the truth

A cell reading removal from the paid tier compares neatly and is quietly wrong whenever a second cause exists. One of these entries names two causes with nothing in common and hedges that the list is not closed.

The register keeps the hedge. A reader relying on a closed list would be relying on something the page declined to say, and the tidier cell on the other entry is only tidier because less was published.

2A test flag is the cause that leaves no trace

A plan appears on an invoice. A flag set in code by whoever built the integration appears nowhere an account page will ever show, and it can apply to everything a season produces.

One of these two entries names that cause and also states that a mark it applied cannot be lifted off a finished video. The other says nothing about permanence in either direction.

3The duty does not care that it is an avatar

A synthetic presenter reading a script is generated content in exactly the sense the paragraph uses. A brand publishing one owes the same disclosure it would owe for a generated scene.

What differs is how obvious the generation is to a viewer, and the obviousness exemption belongs to a different paragraph addressed to a different party. Neither vendor page raises it.

  • Synthesia (synthesia.io)
    The watermark appears on videos generated under certain conditions, such as being on the Basic plan or generating in API test modean avatar video platformSynthesia, knowledge base / recorded 2026-09-22
  • HeyGen
    Watermark removal is not listed among the free plan's featuresthe free tier read as an omissionHeyGen, pricing / recorded 2026-09-22

4Sources

Read from the knowledge-base article at help.synthesia.io and the pricing page at heygen.com, consulted 2026-09-22. Full entries: Synthesia and HeyGen. The column itself is on What it asks for. Other pairs on file: Wan and SceneMixer, Firefly and Kling.