Synthesia vs HeyGen: Training Library or Translated Footage

The short answer: for a training or enablement library built from scripts, at a few videos a month, Synthesia is the cheaper start: Starter costs $19 a month billed monthly, or $14 billed yearly, and 10 minutes of video come with every Synthesia plan each month (Synthesia pricing, checked on 26 October 2026). For translating video you already filmed, with the speaker's lips matched, HeyGen does it on self-serve plans, starting with the $29 Creator plan (HeyGen pricing), while Synthesia keeps one-click translation for Enterprise (translation article).

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Settle these three first:

1. Price the translation. For example, a 6-minute product video in five languages is 30 translated minutes. Dubbed with lip sync in Synthesia at 80 credits a minute, that is 30 x 80 = 2,400 credits, about a sixth of Starter's 15,000 a year (Synthesia pricing FAQ). On HeyGen's Speed engine it is 30 x 6 = 180 of Creator's 600 monthly credits (credits article).
2. What already exists. Decks and scripts point to Synthesia, whose feature list includes PowerPoint import (pricing). Recorded footage points to HeyGen, which translates an uploaded file of up to 5 GB or a linked YouTube or Drive video (translation guide).
3. The number per language. Completion of each language version against the original. If one market drops off early, the script or the voice is the suspect before the tool is.

On features these two sit close together. The difference is in what each fences into which tier, and in what each assumes you start from.

Which plan unlocks what

Sources, read on 26 October 2026: Synthesia pricing, Synthesia translation article, HeyGen pricing and the HeyGen translation guide.

Three differences that settle it

Footage you filmed, or video you generate

HeyGen re-voices the spoken audio in the speaker's own voice and, optionally, moves the lips; text baked into the picture stays as it was (translation guide). Synthesia's one-click translation regenerates its own videos, script and on-screen text together, with a multilingual player, on Enterprise; on any plan, its dubbing re-voices audio only (translation article).

What a small change costs

Synthesia draws credits at generation, not during editing or previewing, and counts only new footage: change three seconds of an existing video and you pay for three seconds (pricing FAQ). HeyGen charges per minute of generated output at the rate of the model you pick and shows the cost before you confirm (credits article). A policy library that changes one line at a time favours Synthesia's rule.

Where team features sit

Synthesia's Enterprise card carries SCORM, brand kits, SAML and live collaboration, without a public price (Synthesia pricing). HeyGen's Business card carries SCORM, brand kits, SAML and integrations with n8n, Make, HubSpot and Zapier at $149 a month (HeyGen pricing). A mid-sized team that needs an LMS export without a sales call ends up on HeyGen.

Prices side by side

US dollars, read on 26 October 2026 on the Synthesia and HeyGen pricing pages.

The agent step: one template, many versions

HeyGen's MCP server exposes its templates. Build the release-note video once in the HeyGen editor, declare variables for the product name, the feature line and the screenshot, then ask Claude to call generate_from_template once per product line, picking or reordering the template's scenes as each line needs. The human check: the product owner signs off the table of variable values before anything generates, and someone watches the first render in full before the rest of the batch runs. Synthesia's own MCP, in public beta, drafts from a prompt into the editor (Synthesia MCP); the avatar consent use case runs that route end to end, with the consent and labelling steps.

Where the estimator starts

Synthesia's plan estimator opens at 30 video minutes a month and recommends Pro, while its own FAQ puts Starter at about 22 minutes a month (pricing). The starting point of the slider is chosen by the vendor, so move it to your real count before you read the recommendation.

Choose Synthesia if

• Your job is a library of scripted training or enablement videos that change line by line.
• You start from decks and documents, not footage.
• An enterprise contract with SCORM and one-click translation is within reach later.

Choose HeyGen if

• Your job is translating recorded video with the speaker's face and voice kept.
• You need SCORM or brand kits on a self-serve plan.
• Marketing and sales will share the tool for personal and social video.

Each has a glossary entry: Synthesia and HeyGen.

Try both for nothing

Synthesia's Basic plan is free, carries 10 video minutes a month and shares by link with a watermark (pricing). HeyGen's no-cost tier stops at three videos a month, a minute each, with its mark on them (HeyGen pricing). Turn one current deck into a short module on Basic, and translate one minute of a recorded talk on HeyGen Free into your second language. The first test answers whether scripts are your bottleneck; the second whether recordings are.

When L&D wants one avatar platform and marketing wants the other, the choice stops being about features and becomes one about who owns video. An interim CMO can make that call and leave the rule in writing before a second contract is signed.

FAQ

Does Synthesia lip-sync dubbed video?

Yes, at a price: its pricing FAQ charges dubbing at 80 credits a minute with lip sync and 40 without, and Basic includes 120 dubbing minutes a year in 70+ languages (Synthesia pricing).

Can I proofread a HeyGen translation before it renders?

Yes, on Pro, Business and Enterprise: Review and Edit lets you correct the translated script word by word before the final video (translation guide).

Do unused credits carry over?

Not on Synthesia, where plan credits reset each period and bought credits last 12 months (pricing FAQ). On HeyGen, monthly credits roll over one more cycle and yearly ones build up until renewal (HeyGen pricing).