Which Apps Have Run The Most UI Experiments In 2026?
Of 4,814 detected experiments (July 2026), 635 were detected in calendar 2026 — just 13% of the corpus. [1] Finch leads with 30 experiments (all in 2026), followed by ChatGPT (12) and Babbel (8); most companies had single-digit 2026 activity. [2] These are observed variations, not confirmed A/B tests.
Only 635 of 4,814 detected experiments (13%) landed in 2026; Finch alone accounts for 30 of them (July 2026).
The finding
Of the 4,814 detected experiments, only 635 were detected in calendar 2026 — about 13% of the corpus. [1] That means the vast majority of detected activity (4,179 experiments) predates 2026, and "what did company X change this year" is only honestly answerable for a handful of apps. [1] Finch dominates the current year with 30 experiments, all in 2026. [2]
The 2026 leaderboard
The current-year leaders are few; below them, 2026 counts drop into low single digits.
How to apply it
When a stakeholder asks "who is actively iterating right now," this is the honest shortlist: Finch and ChatGPT are the only two companies with a defensible double-digit 2026 volume. [2] For everyone else, frame findings as "most recent detected changes" with explicit dates rather than a current-year claim, because 87% of the corpus predates 2026. [1] This is the single most important guardrail for any "this year" page in the family. All figures are detected variations. [1]
Caveats
All figures are observed variations with LLM-inferred rationale, not company-confirmed A/B tests — no lift is measured. [1] Detection date reflects when Lazyweb captured the diff, not necessarily when the company shipped it. [1] Companies with fewer than 8 experiments in 2026 cannot support a standalone current-year page. [2]
The numbers
| Stat | Computed from |
|---|---|
| 635 of 4,814 experiments in 2026 (13%); 4,179 predate 2026 | experiments_2026 (635/4814); total_detected_experiments (4814) |
| 2026 leaders: Finch 30, ChatGPT 12, Babbel 8, AllTrails 4, Bluesky 4, Gauthmath 4, Breathwrk 4, FaceApp 4 | company_total in-2026 splits: finch 30, chatgpt 12, babbel 8, alltrails 4, bluesky 4, gauthmath 4, breathwrk 4, faceapp 4 |
Sources & citations
- [1] Lazyweb Research analysis of 4,814 detected experiments (276 companies, ~800-app mobile corpus), July 2026. 635 experiments have experiment_created_at >= 2026-01-01. ↩
- [2] Lazyweb Research analysis of 4,814 detected experiments (276 companies), July 2026. Per-company in-2026 counts (COUNT DISTINCT experiment_id, experiment_created_at >= 2026-01-01). ↩
Source: Lazyweb Research — proprietary analysis of real, in-market app screens. Cite as Lazyweb Research, 2026-07-07.