Almost none of the posting-frequency advice you have read comes from the platforms. Checked against the record: TikTok is the only platform that ever published a daily number ("1-4 times per day"), LinkedIn has one sentence about weekly pages, Instagram's widely-quoted "2 posts a week" traces to a single 2021 post, and YouTube, X, Facebook, Threads and Pinterest have published nothing at all. Everything else is a vendor dataset or repetition. Here is the full picture in three honest buckets: what platforms said, what studies measured, and where nobody knows.
Bucket 1: what platforms actually said
- TikTok: "Aim to post 1-4 times per day to test how different types of content are received", TikTok's own business blog, from 2021, still live on tiktok.com. It is business-audience guidance and five years old; it is also the only official daily number any platform has published.
- LinkedIn: "Companies that post weekly see a 2x lift in engagement", LinkedIn Pages best practices. No sample or methodology is given; it is an official claim, not a published study.
- Instagram: the circulating "about 2 feed posts per week and 2 Stories per day" traces to a June 2021 @creators post (login-walled; Hootsuite links it as their source for the Stories half). Treat it as reported 2021 guidance, never repeated officially since.
- YouTube: no official cadence exists. The closest official word is a Creator Insider myth-busting video about taking breaks, YouTube's own team addressing whether pausing hurts a channel, not prescribing a schedule.
- X, Facebook, Threads, Pinterest: no platform-official frequency guidance found. That absence is worth knowing: every confident number you see for these platforms is someone's dataset, not the platform speaking.
Bucket 2: what the studies measured
| Source | Sample | TikTok | X | |||
|---|---|---|---|---|---|---|
| Buffer, Jan 2026 | Own user data | 3-5/week (~12% more reach per post vs 1-2) | 2-5/week (up to 17% more views per post) | 2-5/week is the turning point | 3-4/day (thin basis, flagged below) | 1-2/day (via HubSpot's 13,500-user study) |
| Sprout, Aug 2025 | ~3B messages, 1M profiles | Brands average 1-2/day | Real-world ~2 videos/week (RivalIQ 2024) | , | Industry average 2/day | Industry average 5/day |
| Hootsuite, Apr 2025 | Q1 2025 observed | Recommends 3-5/week | Observed 3.7/week | Observed 5.5/week | Observed 18.1/week | Observed 14.2/week, engagement under 1% |
Three cautions the table needs:
- Observed is not optimal. Sprout reports brands post to Facebook five times a day; Buffer's cited evidence says engagement is best at one or two. Hootsuite's observed X average is 18 posts a week with under 1% engagement. Averages describe habits, not what works.
- Weak links are flagged by the authors themselves. Buffer's X recommendation rests on a small third-party review, and its Facebook number is HubSpot's, not its own.
- Populations differ, the same brand-versus-creator split that breaks best-time studies applies here.
Bucket 3: what nobody knows
No study in this set measures the thing creators actually ask: the marginal effect of one more weekly post on *your* account's growth, at *your* quality level. The honest answer is that consistency at sustainable quality beats any target number, and the platforms' own silence on frequency for most surfaces suggests they do not consider cadence a primary lever either, Instagram's stated top signals are watch time, likes and sends, not posts per week.
A defensible starting cadence
If you need numbers to start testing from, these are the most-supported per platform: Instagram 3-5 posts a week (Buffer's reach data), TikTok 2-5 a week with completion quality first (Buffer, against TikTok's aspirational 1-4/day), LinkedIn at least weekly (the one official claim), X and Facebook low and steady rather than the observed firehose. Then adjust on your own reach-per-post numbers, which beat every table above.
Holding a steady cadence across ten platforms is the part that actually breaks people, which is what a scheduler is for. ad2app queues a week of posts in one sitting, and a free account comes with all 10 platform skills emailed on signup, so your AI drafts to each platform's real rules from day one.
Every claim above links its primary source. The per-platform specifics live in the free field guides, sources included.