Last reviewed by Robert Prime — May 2026
Introduction
A newsletter is the most valuable asset in indie publishing. The platform you choose powers it for years.
This guide compares the platforms most UK indie authors actually use in 2026, what each is genuinely good for, and how to pick without over-thinking it.
The shortlist (2026)
The platforms that matter for indie authors:
- MailerLite — best general-purpose for indies
- ConvertKit (now Kit) — premium alternative, slightly more polished
- Substack — content-first; paid newsletter model
- Ghost — newsletter + website combined
- ActiveCampaign — heavier automation; for established businesses
- Beehiiv — fast-growing newcomer
- Mailchimp — declining for authors; not recommended in 2026
Skip everything else (Sendinblue, Brevo, etc.) unless you have specific reasons. Author-specific feature sets matter, and the platforms above cover the indie use case best.
Detailed comparison
MailerLite (mailerlite.com)
Pricing 2026:
- Free tier: up to 1,000 subscribers, 12,000 emails/month
- £8-£15/month for 1,000-5,000 subscribers
- £20-£40/month for 5,000-15,000 subscribers
- Scales reasonably above
What you get:
- Drag-and-drop email designer
- Automation workflows (welcome sequence, drip campaigns)
- Landing pages built-in
- A/B testing
- Pop-ups and signup forms
- Multi-language including UK English defaults
- GDPR compliance built-in
Strengths:
- Best free tier in the market
- Cheap as you scale
- Solid deliverability
- Easy to learn (2-3 hours to feel competent)
- Good for indie authors specifically
Weaknesses:
- Automation slightly less powerful than ConvertKit
- Some features behind paywall (priority support, advanced analytics)
- Interface less polished than premium competitors
Verdict: Best starting point for 80%+ of UK indies.
ConvertKit / Kit (kit.com)
Pricing 2026:
- Free tier: 1,000 subscribers
- £12-£20/month for 1,000-3,000 subscribers
- £25-£45/month for 3,000-10,000 subscribers
- Scales to enterprise
What you get:
- Strong automation (visual workflow builder)
- Subscriber tagging system
- Creator-focused features (paid subscriptions, tip jar)
- Landing pages
- Polished interface
- Recommendation feature (cross-promote with other authors)
Strengths:
- Built specifically for creators (authors, podcasters, YouTubers)
- Excellent tagging + segmentation
- Recommendations feature drives discovery between author lists
- Strong API for integrations
Weaknesses:
- More expensive than MailerLite
- Steeper learning curve
- Free tier more limited than MailerLite
Verdict: Slight premium tier above MailerLite. Worth it if you want best-in-class creator features.
Substack (substack.com)
Pricing 2026:
- Free to use
- Substack takes 10% of paid subscription revenue
- Stripe takes ~3% payment processing
- No fee on free newsletters
What you get:
- Hosted publication (your own subdomain)
- Built-in paid subscription model
- Email + web newsletter combined
- Comments, threads, community
- Discovery via Substack's network
Strengths:
- Best for content-first authors (essays, serialised fiction, opinion)
- Excellent paid subscription model out of box
- Discovery via Substack's recommendation engine
- Polished reading experience
Weaknesses:
- Limited automation (no welcome sequences, drip campaigns)
- No reader-magnet delivery flow
- 10% revenue cut on paid subs
- Less control than self-hosted
- Migrating away is hard
Verdict: Right for content-first authors (literary, essayist, journalist). Wrong for genre fiction authors with reader-magnet funnel + free-book-to-paid funnel.
Ghost (ghost.org)
Pricing 2026:
- Self-hosted: free (but you pay hosting)
- Ghost Pro: £8-£25/month
What you get:
- Newsletter + website on one platform
- Membership tiers (free, paid)
- Modern editor
- Strong content management
- API-first architecture
Strengths:
- Combines newsletter + website (saves cost of separate platforms)
- Premium reading experience
- Good for non-fiction authors building authority
- Open source (Ghost self-hosted)
Weaknesses:
- Less indie-author-specific (built for newsletter publishers, not novelists)
- Smaller community than MailerLite/ConvertKit
- Self-hosted requires technical setup
Verdict: Right for serious non-fiction authors who want one platform for blog + newsletter + paid subscriptions.
ActiveCampaign (activecampaign.com)
Pricing 2026:
- £30-£60/month for entry tier
- Scales steeply
What you get:
- Powerful automation
- CRM features
- Lead scoring
- Advanced segmentation
- Behavioural triggers
Strengths:
- Best-in-class automation
- Strong for businesses with complex funnels (course sales, multiple products)
- Sales pipeline features
Weaknesses:
- Expensive
- Overkill for most indie authors
- Steep learning curve
- Less indie-author community
Verdict: Right for established authors running multi-product businesses (book + course + coaching + membership). Wrong for simple author lists.
Beehiiv (beehiiv.com)
Pricing 2026:
- Free tier: 2,500 subscribers (better than competitors)
- £20-£40/month above
What you get:
- Newsletter platform
- Built-in monetisation (ads, paid subs)
- Recommendation network
- Analytics
Strengths:
- Generous free tier
- Built-in cross-promotion network
- Modern interface
Weaknesses:
- Less mature than MailerLite/ConvertKit
- Less indie-author-specific
- Automation lighter than competitors
Verdict: Strong newcomer. Worth considering for newsletter-first authors. Not yet the obvious choice over MailerLite for fiction.
Mailchimp (mailchimp.com)
Once the default. In 2026: avoid for indie authors.
- Free tier shrunk dramatically
- Pricing now expensive for what you get
- Limited automation in lower tiers
- Acquired by Intuit; product priorities shifted
If you're on Mailchimp, consider migrating to MailerLite.
Switching costs (the most important consideration)
Migrating between platforms means:
- Re-importing subscribers (some unsubscribe during migration)
- Re-creating automations
- Re-engineering signup flows
- Updating back-of-book links to new URLs
- Re-warming list deliverability
It's a 20-50 hour project. Pick well the first time.
For most authors: start MailerLite. Stay on MailerLite. Only switch if you outgrow it (which happens at ~10k+ subscribers or specific advanced needs).
Picking by use case
Genre fiction author, starting out:
- MailerLite (free tier, simple)
Genre fiction author, established (5k+ subscribers):
- MailerLite or ConvertKit/Kit
Multiple pen names:
- ConvertKit/Kit (better multi-account management)
Non-fiction author with course/coaching business:
- ConvertKit/Kit or ActiveCampaign
Literary fiction or essayist:
- Substack (built for this content type)
Serial fiction author (Royal Road / Patreon-style):
- Substack or Ghost
Newsletter-first creator (treating newsletter as primary product):
- Beehiiv or Substack
Migration tips
If you do need to switch:
- Choose new platform; set up fully (workflows, signups, etc.)
- Export subscribers from old platform as CSV
- Import to new platform (some platforms auto-tag, some don't)
- Send a transition email from old platform: "I'm moving newsletters to [new platform]. You're already moved, expect emails from [new sender] starting [date]."
- First email from new platform within 14 days of import — re-engage so they remember
- Keep old platform live for 30 days while monitoring deliverability on new
- Update all back-of-book links + website to new signup URLs
- Cancel old platform
Plan: 4-8 weeks of overlap during migration.
Deliverability
All major platforms have decent deliverability if you use them properly:
- Authenticate your sending domain (SPF, DKIM, DMARC) — most platforms guide you through
- Use a custom domain (notifications@yourname.com beats yourname@mailerlite.com)
- Maintain list hygiene — remove non-openers periodically
- Don't send spammy content — open rates above 20% = good standing with inbox providers
Bad deliverability is usually your behaviour, not the platform.
UK considerations
- GDPR compliance — all major platforms have UK/EU compliance modes; enable at setup
- Servers in EU — most platforms host EU users on EU servers (data sovereignty)
- GBP billing — all major platforms accept GBP via card
- VAT — VAT-registered authors can claim back; below threshold, treat as deductible
- UK-specific deliverability — Outlook/Hotmail UK has slightly different reputation rules; monitor inbox-placement rates
Common mistakes
- Choosing on features alone. All major platforms have similar features. Choose on community, pricing curve, ease of use.
- Switching platforms repeatedly. Each switch loses 5-15% of list. Pick once.
- Using free Gmail to send from. Looks unprofessional; deliverability poor.
- Not authenticating sender domain. Emails land in spam.
- Importing huge stale lists. Damages new-platform reputation. Clean before importing.
- Picking Substack for a fiction reader-magnet funnel. Wrong tool; doesn't support the workflow.
Pricing scales (5-year projection)
For an indie author growing from 0 to 10,000 subscribers over 5 years:
| Year | Subscribers | MailerLite | ConvertKit | Substack |
|---|---|---|---|---|
| 1 | 500 | Free | Free | Free |
| 2 | 1,500 | £8/mo | £20/mo | Free + 10% of paid subs |
| 3 | 3,500 | £15/mo | £35/mo | Free + 10% |
| 4 | 6,000 | £25/mo | £45/mo | Free + 10% |
| 5 | 10,000 | £35/mo | £65/mo | Free + 10% |
Substack appears free but takes 10% of paid subscriptions. For a paid sub product earning £1,000/month, that's £100/month in fees + 3% Stripe.
The bottom line
For 90% of UK indie fiction authors: MailerLite. Free up to 1k subscribers, cheap above, simple to use, all the features you need for the next 5 years.
For non-fiction authors with course funnels: ConvertKit/Kit, with ActiveCampaign as upgrade path.
For content-first essayists or serial fiction: Substack.
For newsletter + website combined: Ghost.
Skip Mailchimp. Watch Beehiiv (improving fast).
Pick once. Don't switch unless genuinely outgrown. Spend the saved time writing.
Frequently asked questions
Can I use Gmail for my newsletter to save money?
No. Gmail isn't a newsletter platform. Deliverability suffers; appearance is unprofessional; no automation. Use a proper ESP.
What about Buttondown / TinyLetter / others?
Smaller platforms with niche appeal. Buttondown is decent and cheap for tech-savvy users. TinyLetter is discontinued. Skip unless you have specific reasons.
Should I use the same platform across multiple pen names?
ConvertKit supports multi-account/pen-name management best. MailerLite requires separate accounts. Plan accordingly.
Can I A/B test subject lines?
MailerLite, ConvertKit, ActiveCampaign — yes. Substack, Ghost, Beehiiv — limited or no.
How important is the platform's email design?
For most authors: email content matters more than design. Plain text + simple formatting often outperforms heavily-designed templates.
