Lightfern
AI writing assistant for Gmail that learns your tone and suggests in-context completions as you type.
What is Lightfern?
Lightfern is a browser extension that works directly inside Gmail to help you write emails faster. It focuses on in-context autocomplete and reply suggestions that adapt to your writing style, aiming to reduce repetitive email drafting while keeping your tone consistent.
Best for: Gmail-heavy professionals · Fast email replies · Tone-consistent outbound email
Developer Stack Fit
Quick read on where Lightfern fits in a software team's AI stack. Validate final fit against your codebase, data policy, and deployment model.
- Stack layer
- AI Security
- Deployment model
- Cloud SaaS
- Open-source status
- Not confirmed
- API support
- Not a primary API tool
- MCP support
- No MCP signal found
- Security posture
- Review vendor privacy and data retention
- Best use case
- Gmail-heavy professionals
Key Features
- 01
Gmail-native AI suggestions as you type
Gmail-native AI autocomplete
- 02
Personalization to match your writing style
Learns your tone over time
- 03
Autocomplete and reply drafting for common email flows
Zero data retention by default (per vendor)
- 04
Designed to work with minimal setup inside your inbox
A core writing capability that teams use daily.
- 05
Security posture: zero data retention by default (per vendor)
A core writing capability that teams use daily.
Pros & Cons
What stands out
- Works directly in Gmail (low friction)
- Useful for repetitive email writing and follow-ups
- Emphasis on data retention controls (per vendor)
Watch outs
- Pricing details are not clearly published on the homepage
- Requires browser extension and Gmail workflow
- Suggestion quality depends on context and your writing patterns
Pricing Plans
Lightfern Pricing
Choose the perfect plan for your needs. All plans include our core features with different usage limits and advanced capabilities.
Free
Need a Custom Solution?
Looking for enterprise features or custom pricing? Contact Lightfern directly for tailored solutions.
Contact SalesMost teams land on the Free plan.
Alternatives
FAQ
What is Lightfern and how does it work?
Lightfern is a writing tool that ai writing assistant for gmail that learns your tone and suggests in-context completions as you type.. It uses AI to help users improve productivity through analyzing input and generating relevant output.
Is Lightfern free to use?
Lightfern offers a freemium model with a free tier. You can get started without paying anything.
Does Lightfern have a free trial?
Yes — Free to try with no time limit.
What can Lightfern do?
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Lightfern
Freemium