Short version: Start with Google when it does the job. It is official, free within quota, and handles metadata, write operations, and private channel data well. Bring in Tapline for public transcripts Google will not return, searches that need to run more often, and public data Google reserves for video owners.
The two APIs, job by job
| Job | Google default | Tapline | Our pick |
|---|---|---|---|
| JobSupported video metadata | Google default1 unit per videos.list call; accepts multiple IDs | Tapline3 credits for one video lookup | Our pickUse Google |
| JobKeyword search | Google default100 calls/day; up to 50 results/call; up to 5,000 records/day | TaplineStarter: about 1,100 calls/day; 10 results/call; about 11,000 records/day | Our pickTapline for more frequent searches |
| JobEvery comment and reply on a video | Google default1 unit per commentThreads.list call; up to 100 threads/call, paged by pageToken | Tapline3 credits per 20-thread page; our comment-extraction walkthrough shows a full cursor walk | Our pickGoogle, unless you need the quota elsewhere |
| JobTranscript from your video | Google default250 units for list plus download; about 40 complete retrievals/day | Tapline2 credits per request | Our pickUse Google if you control the video |
| JobTranscript from a video you don't control | Google defaultNo: Unavailable without edit permission | Tapline2 credits per request | Our pickUse Tapline |
| JobMost-replayed curve | Google defaultNo: No documented v3 endpoint | Tapline2 credits per request | Our pickUse Tapline |
| JobCodec and resolution for a video you don't control | Google defaultNo: Restricted to the video owner | Tapline2 credits per request | Our pickUse Tapline |
Where Tapline fills the gaps
1. Transcripts from videos you do not own
Google's docs are clear: captions.download requires permission to edit the video. For a video you manage, listing and downloading a caption track costs 250 quota units. That works out to about 40 downloads a day on the default quota. No amount of extra quota unlocks transcripts from someone else's public video.
For a hosted option with AI fallback, see Supadata vs Tapline.
2. Searches that need to run more often
Google gives you 100 search.list calls a day by default, with up to 50 results in each call. Pagination eats into that total too. Tapline returns 10 results at a time, but its Starter plan covers about 1,100 daily calls when spread across a 30-day month.
Need more Google quota? You can apply for it, but approval requires a compliance audit. There is no published pay-as-you-go option. Tapline makes more sense when a monitoring job needs to repeat the same search throughout the day.
3. Data Google reserves for video owners
You will not find the most-replayed curve in Google's v3 reference. Codec, resolution, bitrate, and filesize are there through fileDetails in videos.list, but Google only returns those fields to the video owner. Tapline covers both jobs for public videos.
How far a Tapline plan goes
Search, comments, video metadata, and channel requests cost 3 credits each. Transcripts, subtitle tracks, replies, playlists, formats, and the most-replayed curve cost 2. The figures below assume you use the full monthly allowance, so treat them as full-use rates, not pay-as-you-go prices.
| Plan | Monthly bill | Included credits | Search, comments, metadata calls | Transcript calls | Rate limit |
|---|---|---|---|---|---|
| PlanFree | Monthly bill$0 | Included credits100 once | Search, comments, metadata calls33 once | Transcript calls50 once | Rate limit1 req/s |
| PlanStarter | Monthly bill$49 | Included credits100,000 | Search, comments, metadata calls33,333 | Transcript calls50,000 | Rate limit5 req/s |
| PlanGrowth | Monthly bill$199 | Included credits1,000,000 | Search, comments, metadata calls333,333 | Transcript calls500,000 | Rate limit25 req/s |
| PlanPro | Monthly bill$499 | Included credits4,000,000 | Search, comments, metadata calls1,333,333 | Transcript calls2,000,000 | Rate limit50 req/s |
Try the response before you pick a plan.
Sources and fine print
We checked Google's figures against its documentation on 2026-07-31: the quota calculator, search method, videos method, caption listing, caption download, comment threads method, and the quota audit process. The search totals multiply each provider's largest page by its available calls, so the number of unique results may be lower. Metadata calls are not a one-to-one comparison either: Google accepts several IDs, while Tapline looks up one video per request.
Full disclosure: Tapline publishes this page and sells the product being compared. Tapline is independent from YouTube and Google, and neither company endorses it. Google's developer policies generally require you to delete or refresh stored non-authorized API data after 30 days. Authorized data follows different rules, including some statistics you may retain while authorization stays active. Check the current policy and get legal advice before setting your own retention rules.
FAQ
Yes, but only for a video you own or manage. Google's captions.download method requires OAuth 2.0 and permission to edit the video. Listing a caption track costs 50 quota units, and downloading it costs another 200. More quota gives you more calls, but it does not give you permission to download someone else's captions. Details checked 2026-07-31.
For search, the default quota works out to 100 search.list calls a day. Each call can return up to 50 results, so the theoretical ceiling is 5,000 records. Most other methods share a pool of 10,000 units. A videos.list call costs 1 unit and accepts several IDs, which lets one request fetch metadata for more than one video. Details checked 2026-07-31.
Search is usually the culprit. The default quota covers 100 search.list calls a day, and every extra page uses another call. Invalid requests also cost at least one unit, so retries with bad parameters still nibble away at your quota.
Google does not publish a pay-as-you-go option. You can apply for more quota, but Google requires a compliance audit and approval. A larger allowance raises your call limit. It does not unlock captions for videos you do not control or add methods that are missing from the v3 API.
Not for public videos. Google has no documented v3 method for the most-replayed curve. Codec, resolution, bitrate, and filesize are available through fileDetails in videos.list, but only to the video owner. Details checked 2026-07-31.
Stick with Google's API when it covers the job. It is free within quota and hard to beat for metadata, write operations, and private channel data. Use Tapline for public transcripts Google will not return, search schedules that outgrow your quota, engagement heatmaps, or public video formats.
Comparing Tapline with other third-party options instead? Our roundup of YouTube transcript APIs covers the rest of the field, including us.