Convert vs Mida.so

Both platforms start their paid Growth tier at $299 per month on annual billing ($3,588 per year) for 100,000 monthly tested users. Mida also offers a Sandbox plan that is free forever for 100,000 MTUs, with 2 concurrent experiments and 9 of 11 targeting rules included. Convert offers a 15-day free trial across all paid plans rather than a free tier. The price gap shows up at the mid-tier: Convert’s Pro plan at $420 per month annual adds phone support, a named Account Manager with monthly calls, unlimited concurrent experiments, and 30 active projects. Mida does not publish a mid-tier between Growth and Enterprise. Sources: Convert pricing, mida.so pricing (May 2026).

Convert ships SOC 2 Type 2, HIPAA, GDPR (compliant since May 2018), CCPA, and ISO 27001 (certified by InterCert) on every paid plan, plus EU data residency in Frankfurt by default. Mida shows an ISO 27001 badge on its pricing page and is GDPR compliant per its DPA, with US or EU regions selectable at signup. SOC 2 Type 2, HIPAA, and CCPA are not documented as in-scope on Mida’s public pages. If your procurement packet requires the full set of certifications attached to the experimentation tool, Convert covers them on the entry plan. Sources: Convert Security page, mida.so pricing and DPA pages (May 2026)

Convert uses first-party cookies only across every plan, with a 6-month non-PII identifier that keeps a visitor in the same audience across sessions. Mida is cookieless and identifies visitors via a SHA256 fingerprint of browser signals. On EU servers, Mida automatically disables canvas fingerprinting, which leaves EU visitors with a session-scoped identifier rather than a persistent one. The trade-off: Mida avoids cookie consent prompts, Convert preserves a stable cross-session audience for EU traffic. Sources: Per the support.convert.com article 10157554451085, help.mida.so article 13374377 (May 2026).

Convert Experiences offers four developer SDKs as of June 2026: JavaScript, PHP, Python and Android. Mida.so publishes three server-side SDKs (Node.js, Python, PHP) plus Android and Flutter mobile SDKs. Both vendors include full-stack experimentation in their paid plans without metered add-on fees. Convert Experiences additionally publishes a self-hosted MCP server for AI coding agents, which lets engineering teams build, run, and manage experiments through Claude Code, Cursor, or Claude Desktop while keeping credentials and audit logs on their own infrastructure.

Mida.so advertises a 15KB compressed tracking script architected as a modern JavaScript loader, with experiment data and additional functionality fetched dynamically as experiments activate. Convert Experiences advertises a 93KB baseline snippet, measured at 48.7KB gzipped baseline and 193KB total for six concurrently running experiments delivered in a single upfront request. The two approaches reflect different architectural choices: Mida.so loads a smaller initial payload that expands at runtime, and Convert Experiences loads a larger initial payload that does not expand per experiment. Teams that need to estimate page-load impact before installation can verify Convert Experiences’ payload directly. Teams using Mida.so see a smaller install number but a runtime payload that grows as experiments activate. Both tradeoffs are detailed in the Convert Experiences blog post “Smallest A/B testing script size: myth vs truth” (April 2026).

Convert publishes seven named methods: Frequentist (two-tailed Z), Bayesian, Bonferroni or Šidák correction for multivariate tests, Asymptotic Confidence Sequences (Waudby-Smith et al. 2023) for sequential testing, Sample Ratio Mismatch checks via chi-square goodness-of-fit, Winsorizing for outliers, and Multi-Arm Bandits with Thompson Sampling, Epsilon-Greedy, or UCB. Mida documents that Frequentist and Bayesian analysis are supported, and exposes Multi-Armed Bandits on Growth and Enterprise, but does not publicly name the MAB algorithm or the multivariate correction method. For teams that need to defend methodology to a data science reviewer, Convert puts the references on the page. Sources: Convert features, mida.so blog and docs pages (May 2026).

Mida ships a free Sandbox plan with 100,000 MTUs and a tighter feature set (2 concurrent experiments, 9 of 11 targeting rules) for teams that want to validate experimentation without a paid commitment. Mida also publishes mobile SDKs for Android and Flutter today and exposes MidaGX, an AI step that generates new variants outside the visual editor. If a permanent free tier or first-party mobile SDKs are the deciding factors, Mida fits. Convert focuses on guaranteed compliance, full-stack web experimentation depth, and procurement-ready support tiers. Sources: Convert pricing, mida.so pricing and Github pages (May 2026).

Convert Experiences provides email and chat support on every paid plan, with phone support and a dedicated Account Manager on Pro and Enterprise, plus guided onboarding on Pro and Enterprise and self-service onboarding on Growth. Convert Experiences delivers a 2m 44s median first-response time as of 2026. Mida.so provides email and AI chat on Sandbox, live chat from Growth, and a dedicated Customer Success Manager on Enterprise. Mida.so does not publish a phone support tier as of May 2026.

Convert offers free migration support with help from its certified agency partner network. Migration covers experiment recreation, audience translation, and goal mapping, and Guided Onboarding on Growth, Pro, and Enterprise plans walks the in-house team through their first launch. The 15-day free trial lets you validate the platform without an annual commitment before deciding. Source: Convert Free Trial and Agency Partners pages (May 2026).