OpusClip cuts your existing long videos into shorts. ShortFast makes the videos in the first place and posts them for you. They solve different halves of the problem.
These tools aren't really substitutes. OpusClip takes a long video you already recorded and finds the moments worth cutting into shorts. ShortFast starts earlier: it writes the script, generates the video, and publishes it on a schedule, for people who don't have long-form footage to cut from.
If you run a podcast, stream, or YouTube channel with hours of existing footage, OpusClip is solving your actual problem and it's good at it. If you're starting from nothing and need a video a day, clipping doesn't help, because there's nothing to clip.
The honest answer for a lot of people is both, or neither exclusively. Plenty of creators clip their long-form with one tool and fill the gaps with generated content from another.
| Dimension | ShortFast | OpusClip |
|---|---|---|
| Starting point | A topic, a prompt or a script. No source footage needed. | An existing long video, upload or URL. |
| Core job | Generate the video, then publish it on a schedule. | Find the best moments in long footage and cut them into shorts. |
| Visuals | Licensed stock footage, AI b-roll, or AI actors for UGC-style video. | Your original footage, reframed to vertical, plus AI b-roll on higher plans. |
| Voice | Generated voiceover, or AI actors. No recording required. | Your own recorded voice, from the source video. |
| Auto-publishing | Built in. Schedules and posts to TikTok, Reels and Shorts across multiple accounts. | A social scheduler is included on paid plans. |
| Multi-account | Core to the product. Separate pipelines and schedules per account. | Team seats on higher plans, oriented around collaborators rather than many channels. |
| Pricing model | Flat monthly plans by video volume. $1 for a 3-day trial. | Credit-based, where one credit is roughly one minute of source video processed. |
| Cost driver | How many videos you generate and post. | How long your source videos are, regardless of how many clips you keep. |
| A/B testing | Generates variations with different hooks automatically. | Produces multiple clips per video, but not variations of the same clip. |
OpusClip changes its product and pricing independently of us. Check their site for current details before deciding, and tell us if anything here is out of date.
OpusClip charges by the length of the video you feed it, not by the number of clips you get out. One credit is roughly one minute of source video, so a 45-minute podcast costs about 45 credits whether the AI returns three usable clips or twenty.
That's a sensible model when your source material is dense and most of it is clippable. It gets expensive when you're feeding in long, loosely-structured footage to extract a handful of moments, because you pay for the whole runtime either way.
ShortFast's cost scales with output instead: how many videos you generate and publish. Neither model is universally better, but they reward different behaviour. OpusClip rewards having tight source material. ShortFast rewards knowing how many posts a month you want.
Clipping tools have a hard dependency: you need footage. For creators who already record hours a week, that's trivially satisfied and clipping is close to free content. For everyone else, it's the entire problem.
A local business, an e-commerce brand, a SaaS founder, or someone starting a faceless channel typically has no long-form archive. The bottleneck isn't finding the good moments in their footage, it's that no footage exists, and no clipping tool addresses that.
This is the real dividing line between these two products, and it's worth being honest that it means most people should be able to tell within about ten seconds which one they need.
Both tools produce captioned vertical video and both can schedule posts, so there's genuine overlap at the output end. If your only requirement is 'captioned 9:16 video on a schedule', either works.
The overlap breaks down on volume and consistency. Clipping produces content in bursts tied to when you record. Generation produces it on a fixed cadence regardless. If you record weekly and want to post daily, clipping alone leaves you short most days.
We built a free clip finder for exactly the middle case: paste a transcript, get the moments worth cutting, ranked. It won't render the video, but it does the triage step, and it costs nothing to try alongside whichever tool you end up paying for.
Paste a transcript, get the moments worth cutting, ranked.
Learn moreComparisonGeneration-first, but a very different workflow.
Learn moreComparisonRepurposing text and long video into short clips.
Learn morePlatformHow the publishing side actually works.
Learn moreFeatureDifferent hooks on the same video, automatically.
Learn moreFree toolThe starting-from-nothing case, free to try.
Learn moreThree days of full access. If OpusClip suits you better, that's a useful thing to find out cheaply.