Derived from 7 fully verified providers. Data collected January–April 2026.
Transparency score 1–5: 5 = all tiers fully listed with no hidden gating; 1 = "contact sales" required for any pricing. Scores from the open dataset at dialphone.com/research/.
Unverified providers (#8–13) are ranked alphabetically within their group. Transparency scores will be assigned upon full manual verification (target: August 2026). Entry prices reflect lowest published annual plan. BAA availability from the open dataset — see full methodology.
Transparency scores (1–5) assigned by two independent reviewers. 5 = all pricing tiers fully listed publicly with no contact required. 4 = mostly clear, minor friction. 3 = some tiers require form submission or quote. 2 = pricing requires sales call for most tiers. 1 = no public pricing at any tier. Scores averaged across reviewers. Scraper-blocking detected by sending automated HTTP requests from a residential IP; CAPTCHA, 403/429, or blank price fields count as a block. Data collected January–April 2026; last manual verification April 28, 2026.
Each finding traces directly to the open dataset at /research/.
blocks_automated_scraper field, dataset v1.0.0.
pricing_transparency_score_1_5, dataset v1.0.0.