Spark +AI

Overview

Spark +AI adds an AI Assistant to Spark’s email app for people who want help finding information, drafting messages, and handling scheduling and inbox tasks across multiple accounts. Its breadth is useful, but the paid plans, monthly AI quota, and provider-retention window are worth weighing before you move a work inbox onto it.

The assistant works with Gmail and Google Workspace, Outlook and Office 365 including Exchange Online, iCloud, Yahoo, and standard IMAP accounts. It searches email, attachments, calendar information, and meeting notes, though attachment support is limited to PDF and TXT. Spark, part of privately held productivity software company Readdle, was founded in 2007.

For other options in the category, see AI Email Assistants.

Key features

Search and follow up

AI Assistant searches across messages and meeting information, summarizes threads, and supports follow-up actions. That makes it more than a writing aid for users who need to retrieve context from a busy inbox. It can use PDF and TXT attachments, but readers who rely on other file formats should not expect those to be covered.

Writing and inbox actions

The assistant can draft and rephrase email, proofread for grammar and clarity, translate messages, check colleagues’ availability, schedule meetings, and organize the inbox. It can draft and send emails, while automatic sending is not a capability; the user remains in the sending loop. That distinction suits people who want help with routine work without handing over unattended dispatch.

Integrations and privacy

Spark lists integrations with Notion, Asana, Slack, Todoist, Zoom, Microsoft Teams, and HubSpot. Salesforce and Pipedrive support is coming soon. For AI processing, Spark says email and request history stay local and only a few emails relevant to a query go to its AI provider. Provider copies may be kept for up to 30 days for abuse monitoring. Spark says providers do not train models on user data, and AI features can be turned off in settings. That is a meaningful privacy control, but the retention period may not suit every organization.

Pricing

Spark uses a freemium model, with paid plans starting at $10 a month per user, and a 7-day trial. The Free plan costs nothing and includes Smart Inbox, unlimited email accounts, Smart Notifications, and Calendar. It has five lifetime Meeting Notes and no Spark +AI quota details in the plan comparison; it is best for users who want Spark’s core email features rather than sustained AI assistance.

Plus costs $10 a month, billed $10 / month per user or $120 / year. It adds Spark +AI, AI Assistant, 40 AI Meeting Notes per month, and essential team collaboration. Spark +AI also uses a monthly quota, so the meeting-note allowance is not the only usage constraint. Plus suits individuals and small teams that want regular AI help at the entry paid price.

Pro costs $20 a month, billed $20 / month per user or $240 / year. It includes everything in Plus, unlimited AI Meeting Notes, advanced team collaboration, and HubSpot integration. Professionals and client-facing teams who need the higher meeting-note allowance and added collaboration tools are the clearest fit; the doubled per-user price is harder to justify for occasional AI use.

Enterprise has custom pricing. It includes everything in Pro plus security and controls, a dedicated success manager, and 1:1 productivity coaching. Spark positions it for larger teams needing advanced security and support. The Free plan gives up the ongoing meeting-note allowance and paid AI access; Plus gives up unlimited Meeting Notes, advanced collaboration, and HubSpot; Pro gives up Enterprise’s additional security and support services.

Platforms

Spark is available for Android, iOS, macOS, and Windows, giving users a choice of mobile and desktop platforms.

Who it's for

Spark +AI is a good fit for individuals and teams already working across supported email accounts who want search, writing help, scheduling, and inbox organization in one app. Plus is the sensible starting point for lighter individual or small-team use; Pro better matches professionals and client-facing teams using meeting notes and collaboration heavily. Larger teams needing dedicated support and security controls should consider Enterprise. It is a weaker fit for people who need unattended automatic sending, broader attachment-format support, or AI use without a monthly quota.

Pros and cons

• Pros: Search spans email, calendar, meeting notes, and supported attachments, making it useful for finding context rather than just composing replies.
• Pros: Writing, scheduling, and inbox actions cover several common email tasks, while sending still requires user involvement.
• Pros: Broad provider support and four device platforms make it practical for people with mixed accounts and devices.
• Cons: Attachment use is limited to PDF and TXT, which narrows its value for file-heavy workflows.
• Cons: Paid access is per user, AI features consume monthly quota, and meeting-note limits vary by plan.
• Cons: Provider copies may be retained for up to 30 days, a consideration for privacy-sensitive teams.

Alternatives

For focused email assistance, Mailbutler Smart Assistant has a free Starter plan, a free trial, and support across Android, iOS, desktop, web, and browser extension. Its Starter emails include a visible Mailbutler signature, so weigh that trade-off if choosing its free tier.

Perplexity is a freemium option with limited daily use on its Free plan and a $20 a month Pro plan for expanded use. Pick it when that broader assistant’s stated daily-use tiers suit you better than Spark’s per-user email plans.

Spike offers a free Starter plan for up to 3 members and one teamspace, with 60 days of search history and 15 GB storage per member; its Team plan costs $4 a month. Consider it if those team and storage limits are a closer fit, though it has no free trial.

Superhuman Go has a free plan with basic inline suggestions, chat with tabs and apps, editable shareable documents, and synced conversations, plus a free trial. It is worth considering when those free assistant features better match the task.

OpenMailBot has a free Community plan with all AI features, ChromaDB and Ollama, unlimited users and inboxes, and GitHub community support.

EmailOps is a free option with all features included and no account requirement.

Kerna offers a free Starter tier with 30,000 tokens, GPT-5.6, all features, and a single-user license, alongside a €12 a month Standard plan with 500,000 tokens. Its token-based tiers may suit someone comparing against those stated allowances.

Mailtwine is a paid product with free beta access to all features and no plan limits during beta; its paid-plan pricing will be announced before launch.

Verdict

Choose Spark +AI if you want one multi-platform email app that combines broad account support with search, writing, scheduling, and inbox assistance. Its strongest case is the range of email work it brings together; look elsewhere if you need automatic sending, more attachment formats, or a clearer path to unrestricted AI use without per-user paid plans and quota.