Cloud Hosting & PaaS Platforms
4.4/5.0
VerifiedFreeLast technical review:
Markdown for AI (.md)

Sendoff

Send newsletters and announcements to your list from Claude or Codex using AWS SES.

Pricing

$0/mo

Free
Score

4.4/5

License
MIT
Last technical review
2026-11-07
Available plansVisit website (opens in a new tab)

Technical Overview

Sendoff allows sending mass email campaigns, newsletters, and announcements directly from AI assistants like Claude or Codex. The infrastructure is deployed on your own Cloudflare and AWS accounts, using Amazon SES for delivery and React Email for templates. It is built for technical teams seeking a self-hosted alternative for broadcast-only email lists.

Analyst Evaluation: Pros and Limitations

Verified Advantages

  • Fully self-hosted architecture on Cloudflare and AWS.
  • Direct integration with AI agents like Claude or Codex.
  • Uses React Email for layout design.

Technical Considerations

  • No support for advanced segmentation, automations, or A/B testing.
  • Not suitable for sending transactional emails.

Technical Capabilities & Features

4/7
Included:REST & GraphQL API
Not available:SSO / SAML Authentication
Included:Self-Hosted Option
Included:Full Data Export
Not available:Role-Based Access Control (RBAC)
Included:Custom Domains & SSL
Not available:Immutable Audit Logs
Scorecard
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Technical Scorecard: Sendoff

85/100
DX & Tech Documentation
Excellent
90/100
Pricing Fairness
Excellent
95/100
Security & Governance
Favorable
75/100
Data Portability & Sovereignty
Excellent
85/100
Performance & Reliability
Excellent
80/100

Time to Value & Fit by Segment: Sendoff

Estimated Time-to-Value1 - 7 days (Agile)

Standard sprint integration without complex external dependencies.

Learning CurveModerate (Standard)

Requires consulting technical documentation and basic credentials setup.

Fit Index by Organization Size

Startup & Agile Teams1 to 50 members
90%
Mid-Market & Scaleup50 to 500 members
60%
Corporate Enterprise500+ members
30%
Pricing & TCO
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Pricing

$0.00/mo

Model: FREE.

Available plans:

  • Open Source / Self-Hosted$0/mo

Free Tier Verification:

  • No credit card required
  • Commercial use allowed
  • Unlimited usage with no expiration
  • No mandatory watermarks
Get Sendoff (opens in a new tab)

Billing Risks & Hidden Clauses: Sendoff

Free Tier Limits:

Software de código abierto y autohospedado sin costes de licencia base.

Total Cost of Ownership (TCO) Projection: Sendoff$0.00/mo
Deterministic cost estimation at 12 and 36 months based on team size, including SSO tax premiums and annual prepay discounts.
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Licensing Cost (1 to 100+ seats)
$0/forever
Unlimited team members with zero penalties
SSO Tax (SAML Enterprise)
$0no surcharge
No artificial security barriers
3-Year Investment (Software TCO)
$0total
operates under a zero-cost or open-source model. Licensing TCO is identical:
Usage Surcharges & Bill Shock Simulator: SendoffWhat usage costs as you scale
Detect overage penalties before they impact engineering budget.
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Prototype / MVP (10 GB)

Included base quota in plan: 10 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Suitable for development; verify concurrent connection limits.

Base Production (50 GB)

Included base quota in plan: 50 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Implement table compression policies and temporal partitioning.

Active Growth (250 GB)

Included base quota in plan: 250 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Offload cold backups to standard object storage (S3).

Large Scale (1.000 GB (1 TB))

Included base quota in plan: 1,000 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Migrate to dedicated instance or self-hosted cluster to curtail I/O fees.

Security & Data Exit
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Compliance & Security Standards: Sendoff

SOC 2 Type IINot reported
ISO 27001Not reported
GDPR / RGPDNot reported
HIPAANot reported
PCI-DSSNot reported
Jurisdiction & Legal Sovereignty
🇺🇸United States [US]Subject to US CLOUD ActDPA On Request
SSO Availability (SAML Enterprise)
No SSO Documented
Data Residency
SELF_HOSTEDAWSCloudflare
AI Privacy Policy
Not evaluated
Data Liberation & Migration Runbook: SendoffJSON · SQL
Actionable escape runbook and credential export guarantees to mitigate vendor lock-in.
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Supported Structured Export Formats
JSONSQL
Password Hash Portability
Locked: Proprietary Algorithm / No Export

Credential hashes are guarded under proprietary algorithms and cannot be exported.

CLI Command / Rescue Endpoint
git clone
Exit Protocol & Migration Notes

Al ser una solución basada en código abierto alojada en infraestructura propia, la exportación de datos y listas depende directamente de las bases de datos Cloudflare D1 asociadas.

Deployment & Infrastructure Requirements: SendoffMIT
Hardware specs and Docker directives to run on local servers, dedicated VPS, or Kubernetes without telemetry leak to the cloud.
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Minimum Memory1 GB RAM (Recommended)
Compute CPU1 vCPU
Runtime / LanguageTypeScript
Code LicenseMIT
Docker CLI Directive
docker run -d --name sendoff -p 8080:8080 sendoff:latest
Companion Services & Dependencies:
PostgreSQL 15+Redis 7+
Community & Repository
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Technical Reputation of Sendoff

80/100 Technical Trust

Frequent Praises in Production

  • Fully self-hosted architecture on Cloudflare and AWS.
  • Direct integration with AI agents like Claude or Codex.
  • Uses React Email for layout design.

Reported Production Frictions

  • No support for advanced segmentation, automations, or A/B testing.
  • Not suitable for sending transactional emails.
Commercial Treatment & Vendor Lock-in:1-Click Cancellation

Immediate cancellation from account settings without phone calls or forced retention.

Open source repository activity: Sendoff10
Stars, forks and release cadence
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Stars10
Forks1
Open Issues1
SPDX LicenseMIT
Latest Commit DetectedNov 2, 2026

Frequently Asked Technical Questions (Sendoff)

How are emails delivered?

Sendoff uses your own Amazon SES account configured within your Cloudflare Worker infrastructure to ensure message delivery.

Is complex external infrastructure required for deployment?

The system is designed to run primarily on Cloudflare (Workers, D1, Queues, and Turnstile) alongside your existing AWS SES account.

Does it support subscriber segmentation or A/B testing?

It does not feature segmentation, automated sequences, or A/B testing, as it is focused strictly on general broadcast lists.

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