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SealTask vs. Todoist

Simple personal productivity compared with encrypted team task management.

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No credit card Zero-knowledge encryption Team-ready boards

Zero-knowledge

We do not hold the client keys needed to decrypt readable workspace content

$0 Free tier

No credit card required

500+ professionals

Trusted by privacy-focused teams

Quick verdict.

Choose SealTask if shared team tasks contain sensitive content and privacy matters more than personal productivity shortcuts. SealTask may help with technical safeguards for regulated workflows. Before any PHI use, SealTask must expressly agree in writing. Where HIPAA applies, SealTask and the customer must execute a HIPAA-compliant BAA before use. Choose Todoist if you want fast personal task capture, reminders, calendar views, and a generous free plan for lightweight tasks.

Feature comparison.

Feature SealTask Todoist
End-to-End Encryption
Zero-Knowledge Architecture
Self-Hosted Deployment Option
Provider Can Access Workspace Content
AI Features Can Process Workspace Content
GDPR Support
SOC 2 Certified
Open Source Crypto
Data Export
Team Collaboration
Kanban Boards
Personal Free Plan
Natural Language Quick Add
Calendar & Reminders
Granular Team Activity Logs
Starting price €0; Personal €5.90/mo; Team €4.90/seat/mo Free; Business $8/user/mo annually

AI processing means workspace content may be processed when AI features are enabled or used; it does not mean customer data is used for model training.

Want the private option?

Try SealTask in the hosted cloud, or talk to us about the licensed self-hosted Docker image for your own hardware.

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Who should choose which?

Choose SealTask if...

  • You handle sensitive client or internal project data
  • You need strong encryption for regulated workflows
  • You do not want server-side AI processing workspace content
  • You prefer focused task management over a broad work OS
  • You want the provider unable to read encrypted content
  • You want a licensed self-hosted Docker option on your own hardware

Choose Todoist if...

  • You primarily need a personal productivity app
  • Fast task capture and natural language input are essential
  • Reminders, calendars, and personal filters matter most
  • A free individual plan is more important than team content privacy
  • Your tasks are lightweight and not highly sensitive

Security architecture.

SealTask: zero-knowledge.

SealTask encrypts readable workspace content on your device with ChaCha20-Poly1305 before sync. The client unlocks keys with an OPAQUE export key plus HKDF, and optional one-time backup keys stay user-held. The service does not hold the keys needed to decrypt that content; account and operational metadata remain server-visible.

Result: A database breach or legal demand can expose ciphertext and server-visible account, billing, security, audit, service, and workspace metadata. SealTask cannot decrypt readable workspace content without the client-held keys.

Todoist: personal task security controls.

Todoist publishes TLS for data in transit, encryption at rest for most stored user data, AWS hosting, SOC 2 messaging for Business, and restricted staff access. This is conventional SaaS security rather than zero-knowledge content encryption.

Result: Provider-side compromise or authorized access paths could expose plaintext content. Todoist can process content for sync, reminders, AI features, support, and lawful data requests where it is technically able to access that content.

Frequently asked questions.

Is Todoist end-to-end encrypted?

No. Todoist publishes encryption at rest and in transit, but not SealTask-style client-side end-to-end encryption. That means the service can process workspace content in plaintext for product features and authorized support workflows.

Can Todoist employees see my data?

Todoist publishes access controls and policies limiting employee access, but its architecture still permits authorized server-side access to workspace content. With SealTask's zero-knowledge architecture, even our engineers cannot access encrypted workspace content because we do not have the keys.

Does Todoist use my data for AI training?

Todoist publishes commitments that customer content is not used to train AI models. Its AI features can still process workspace content when enabled or used. SealTask cannot process encrypted workspace content with server-side AI because we cannot decrypt it.

Can I use Todoist or SealTask for HIPAA-regulated PHI?

Do not treat either product as HIPAA-ready by default. SealTask's zero-knowledge design may help with technical safeguards. Before any PHI use, SealTask must expressly agree in writing. Where HIPAA applies, SealTask and the customer must execute a HIPAA-compliant BAA before use. Todoist currently says it has not yet pursued HIPAA certification.

Which is better for simple task management?

Todoist is excellent for personal productivity, quick capture, reminders, calendar views, and lightweight team tasks. SealTask is better when shared team tasks contain confidential content.

Explore private Todoist alternatives

How do task tools' security track records compare?

We maintain dated, source-linked records of publicly documented security incidents across task-management vendors — what happened, how each event is classified, what the sources establish, and why Have I Been Pwned coverage is not the same as incident history.

Browse the incident records

Comparing for a specific kind of private work?

The guide library adds audience-specific workflows, metadata caveats, and system-of-record decisions for legal, people, executive, startup, consulting, and private-practice work.

Browse audience guides

References.

  1. 01
    Todoist pricing update - Current Pro and Business pricing changes
  2. 02
    Todoist pricing - Free, Pro, and Business plan features
  3. 03
    Todoist security policy - Encryption in transit, encryption at rest, and Business admin controls
  4. 04
    Todoist security, privacy, and compliance - GDPR, SOC 2, staff access, and HIPAA statement
  5. 05
    Doist AI providers - AI providers, data retention, and no-training commitments
  6. 06
    SealTask security architecture - Zero-knowledge encryption details
  7. 07
    RFC 8439: ChaCha20-Poly1305 - Encryption standard used by SealTask

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