Almost none of the posting-frequency advice you have read comes from the platforms. 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. The full picture sorts into three 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:
- 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. 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 the free platform guides spell out each platform's real rules, so you post by them from day one.
Go deeper: how to post on TikTok · how to post on LinkedIn.
Every claim above links its primary source. The per-platform specifics live in the free platform playbooks, sources included.