productivityatlas.

Evidence / Source register

Follow the evidence.

Original links from the supplied September 2026 report. A source link is a way to inspect a claim, not proof that every claim has been verified again.

14

Otter.ai, “Pricing,” accessed September 14, 2026.

20

Todoist, “Pricing,” accessed September 14, 2026.

21

Superhuman, “Mail Pricing,” accessed September 14, 2026.

23

Make, “Pricing” and “Credits,” accessed September 14, 2026.

34

Obsidian, “Pricing,” accessed September 14, 2026.

38

Erik Brynjolfsson, Danielle Li, and Lindsey R. Raymond, “Generative AI at Work,” NBER Working Paper 31161, 2023; published in Quarterly Journal of Economics in 2025.

47

Coalition for Content Provenance and Authenticity, “C2PA Explainer,” accessed September 14, 2026.

Expanded-edition source checks

144 additional source records, checked 16 September 2026. These establish product descriptions and guide evidence, not hands-on testing or an independent audit. Some also appear in the original bibliography.

E014

Joplin ↗

Joplin · Directory · Checked 2026-09-16

E039

Basecamp ↗

37signals · Directory · Checked 2026-09-16

E059

tl;dv ↗

tl;dv · Directory · Checked 2026-09-16

E080

Junie ↗

JetBrains · Directory · Checked 2026-09-16