TL;DR
Looking for encrypted task management? Start with the encryption model, then check compliance contracts, AI settings, and pricing. Worklist focuses on zero-knowledge task management with ChaCha20-Poly1305 content encryption. Standard Notes is a strong encrypted notes-and-todos option. Notion, Trello, and ClickUp offer broad productivity features with conventional SaaS encryption, provider-side processing, and published security controls.
Our top picks.
Best for task privacy
Worklist.
Zero-knowledge task management. ChaCha20-Poly1305 content encryption. PHI still requires a written compliance agreement or BAA.
Price
$8.50/seat/mo Team
Best encrypted notes + tasks
Standard Notes.
End-to-end encrypted notes with tasks/todos. Strong privacy fit, but not a full project-management suite.
Price
Free; Productivity from $90/year
Best all-round workspace
Notion.
Broad docs, databases, and project workflows. Encryption at rest/in transit, Enterprise BAA path, and AI no-training commitments.
Price
$10/member/mo, billed annually
Best free kanban option
Trello.
Simple kanban boards. Free plan is limited to 10 collaborators per Workspace and 10 boards per Workspace.
Price
Free; paid from $5/user/mo annually
Security feature comparison.
| Feature | Worklist | Standard Notes | Notion | Trello | ClickUp |
|---|---|---|---|---|---|
| End-to-end content encryption | Yes - workspace content is encrypted on device | Yes - notes, files, tasks/todos are encrypted client-side | No - encryption at rest and in transit | No - Atlassian cloud encryption at rest and in transit | No - encryption at rest and in transit |
| Zero-knowledge content model | Yes - Worklist does not hold content decryption keys | Yes - only users have the keys for private content | No | No | No |
| HIPAA / PHI posture | PHI requires written compliance agreement or BAA | Do not assume HIPAA/BAA support without vendor confirmation | Enterprise BAA path with required security settings | Trello is not documented by Atlassian as BAA-eligible | Enterprise BAA path |
| Provider-side plaintext processing | No plaintext access to encrypted Workspace Content | No plaintext access to encrypted notes content | Provider-side systems can process content for features and authorized workflows | Atlassian cloud can process Trello content for product operation and support | Provider-side systems can process workspace content for product features |
| AI workspace-content processing | No server-side AI workspace processing represented here | No workspace AI feature represented here | Can process workspace content when AI is used; no-training commitment; retention terms vary by plan | AI features can process card content; Atlassian says no model training | Can process workspace content when AI is used; no-training commitments and zero-retention controls |
| Best fit | Teams prioritizing content privacy | Encrypted notes with task/todo support | General productivity and workspace docs | Simple visual kanban boards | Feature-rich work management |
| Starting price | $8.50/seat/mo Team, min 2 seats; $9.90/mo Personal | Free plain-text plan; Productivity from $90/year | Plus from $10/member/mo, billed annually | Free up to 10 collaborators; paid from $5/user/mo annually | Free; Unlimited from $7/user/mo, billed yearly |
Table reflects publicly available information as of May 17, 2026. AI processing means workspace content may be processed when AI features are enabled or used; it does not imply customer data is used for model training.
How to choose the right tool.
Do you handle sensitive or regulated data?
If you work with client data, healthcare information, legal documents, trade secrets, or financial data, prioritize end-to-end encryption and zero-knowledge design. Also confirm what metadata remains visible and what contractual safeguards you need.
What are your compliance requirements?
HIPAA, SOC 2, and GDPR are not satisfied by encryption alone. For PHI, confirm a BAA or written compliance agreement, audit and access controls, retention terms, incident obligations, and how each party handles availability and recovery.
How large is your team?
Larger teams may prioritize features over security. Smaller teams handling sensitive data should prioritize privacy. Consider whether you need enterprise SSO, audit logs, and admin controls.
Do you want AI features?
AI-powered search, summaries, and suggestions can require server-side processing of relevant workspace content. Check whether AI is optional, what content is sent, retention terms, subprocessors, and whether the provider commits not to train models on customer data.
What's your budget?
Security and admin controls often move into paid tiers. Free plans commonly limit seats, storage, history, boards, or advanced views, so compare the actual plan that fits your team rather than the headline free tier.
Frequently asked questions.
What's the difference between end-to-end encryption and encryption at rest?
End-to-end encryption (E2EE) means content is encrypted on your device before it reaches the service, and only authorized endpoints can decrypt it. Encryption at rest means stored data is encrypted in the provider's infrastructure, often with KMS and access controls, but provider-side systems can still process plaintext for product features and authorized workflows.
Is Notion encrypted?
Yes, Notion publishes encryption at rest and in transit, plus KMS and access-control practices. Notion is not positioned as a zero-knowledge end-to-end encrypted workspace, so its service can process workspace content for features and authorized support/recovery workflows.
Which task manager is HIPAA compliant?
Do not treat any task manager as HIPAA-ready by default. Worklist's zero-knowledge design may help with technical safeguards, but PHI requires a written compliance agreement or BAA with Worklist. Notion and ClickUp publish Enterprise BAA paths. Atlassian's HIPAA documentation currently lists Jira, Jira Service Management, and Confluence as BAA-eligible products, not Trello. Standard Notes does not publish a BAA path in the sources reviewed here.
What is zero-knowledge architecture?
Zero-knowledge architecture means the provider is designed not to have the keys needed to decrypt protected content. In Worklist, workspace content is encrypted on the client, while account data and operational metadata are still processed by the service. A database-only breach should expose encrypted content rather than readable task text.
Can I trust project management tools with sensitive business data?
It depends on the tool's architecture, controls, and contract. Conventional SaaS tools can have strong security programs, but provider-side processing and authorized access paths are part of the model. For trade secrets, legal matters, healthcare workflows, or other sensitive content, evaluate end-to-end encryption, support access, AI settings, audit logs, BAA/DPA terms, and export/recovery needs.
Do AI features in task managers compromise security?
AI features can require workspace content to be processed by provider-side AI systems when enabled or used. That is different from model training: Notion, ClickUp, and Atlassian publish commitments that customer/workspace data is not used to train AI models. If privacy is critical, check AI enablement controls, retention terms, subprocessors, whether Enterprise zero-retention terms apply, and whether content processing happens locally or server-side.
References & standards.
- 01 Worklist Security — Zero-knowledge encryption details
- 02 Worklist Terms of Service — PHI requires written agreement
- 03 Standard Notes Plans — Free, Productivity, and Professional plan details
- 04 Notion Security Practices — Encryption, KMS, access controls, HIPAA
- 05 Notion HIPAA — Enterprise BAA eligibility and setup
- 06 Notion AI Security & Privacy Practices — No-training commitment and retention
- 07 ClickUp Security — Encryption, compliance, AI commitments
- 08 ClickUp AI Privacy FAQ — No-training posture and retention controls
- 09 ClickUp GDPR and HIPAA Help — Enterprise BAA path
- 10 Trello Pricing — Free, Standard, Premium, Enterprise tiers
- 11 Atlassian Security Practices — Trello encryption and KMS
- 12 Atlassian HIPAA Documentation — BAA-eligible products
- 13 Atlassian AI Trust — AI providers and no-training posture
- 14 Standard Notes Security — End-to-end encrypted notes and tasks
- 15 HHS HIPAA Cloud Computing Guidance — No-view cloud services still require BAAs
- 16 RFC 8439: ChaCha20 and Poly1305 for IETF Protocols — IETF cryptographic standard
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