Best Marketing & Email Software

Users value that SaneBox works with any provider and any email app, quietly moving low-priority mail into a SaneLater folder and unsubscribing with SaneBlackHole. Complaints centre on the lack of a free plan, the 1–4 week training period before sorting feels accurate, the restrictive Snack plan, and per-account pricing that pushes anyone with three addresses to the $36 Dinner plan.

Teams like that Front feels like email rather than a ticketing tool: shared inboxes, assignments, internal comments and shared drafts sit in one familiar view. The recurring complaints are cost — AI features like Copilot and Smart QA are paid add-ons below Enterprise — and the plan caps, which force a full-team upgrade once you pass 10 seats or need more than one channel type.

Users like Spark's Smart Inbox, unified inbox for unlimited accounts and the fact that the free plan is genuinely usable. The main complaints are the 2025 pricing change (the old ~$60/year Premium plan closed to new sign-ups and was replaced by Plus at $99/year and Pro at $199/year), AI features that run on monthly credit quotas, and privacy concerns because Spark stores account credentials on its servers to power push and Send Later.

Reviewers consistently praise the speed: split inbox, 100+ keyboard shortcuts and instant search make a high-volume inbox feel manageable. The most common complaints are price (there is no free plan), the learning curve of the shortcut-driven workflow, and the fact that it only works with Gmail and Microsoft 365 accounts. Since the 2025 Grammarly acquisition, some buyers are also confused by the separate "Superhuman Suite" vs "Superhuman Mail" pricing.