Kapwing Pro at $16 a month buys 80 Sume caption jobs

Kapwing Pro lists at $16 per member per month billed annually ($24 monthly), and the same $16 buys 80 standalone caption jobs on Sume at $0.20 each. They are different tools: Kapwing is an editor with exports up to 2 hours on paid plans and a 4-minute export cap on Free, and Sume is an API that burns captions into clips of up to 60 seconds. For a person editing, Kapwing; for a program, Sume.

What Kapwing lists

Kapwing's page lists Free at $0 with exports up to 4 minutes and a watermark, Pro at $16 per member per month billed annually or $24 monthly, Business at $50 annually or $64 monthly, and Enterprise on request. Pro and above remove the watermark and allow exports up to 2 hours. The page I fetched did not mention an API.

What a caption job covers

A Sume standalone caption job reserves and captures $0.20 for a clip of up to 60 seconds, so 80 jobs caption 80 short clips. If your clips average 30 seconds, you caption 40 minutes of footage. Pro on Kapwing costs the same monthly whether you export one clip or hundreds, so heavy editors win on volume.

Steps: caption 80 clips from a script

• Put each clip at a public HTTPS URL.
• POST each to /v1/video-captions with a unique Idempotency-Key per clip.
• Use a webhook or poll the job status for results.
• Read the cost from each job; failed jobs refund the reserve.

curl -X POST https://api.sume.com/v1/video-captions \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: clip-001-captions" \
  -d '{"video_url":"https://example.com/clip-001.mp4","style":"tiktok-green"}'

What Sume does not do

Sume has no timeline editor, no brand kit UI and no seats. It does not cap exports at 4 minutes because it does not export projects; it captions one finished clip per job.

A weekly workflow example

A social team posts 5 short clips a day, 150 a month. Captioning all of them on Sume is 150 jobs at $0.20, so $30. A Kapwing Pro seat at $16 a month annual would cover the editing time of one person but the page does not describe an API for automating those captions. So the real question is whether a person opens each clip or a script submits it. If a person is editing the clip anyway, the seat cost is small; if nobody opens the clip, a script wins.

Watermarks and limits

Kapwing's Free plan exports with a watermark and caps exports at 4 minutes; Pro and above remove the watermark and extend exports to 2 hours. Sume has no watermark policy to compare because it is not an editor, and a caption job is priced for a clip of up to 60 seconds at the current fixed estimate. If your clips run past that, read the live price in GET /v1/catalog before batching.

Verdict

Editing by hand at least weekly: Kapwing Pro is built for it. Captioning a queue of short clips from code: pay per job on Sume. Neither replaces the other.