Operations Systems
Content production, AI-assisted or fully handwritten, plus editorial workflow, internal tools and deliverability. Your editor reads, approves and sends.
See operations systemsWe build the software that runs your newsletter.
Custom tools to operate, monetize and grow it: production pipelines, sponsor outreach, ad operations and growth systems, wired into the platforms you already use.
Issue #212 · Morning editionIn review
01ResearchDone
02DraftDone
03Checks18/18
04RenderDone
05ReviewEditor
06Send6:30 AM
OperationsOpen rate47.2%+1.8 pts
GrowthSubscribers48,310+612 this week
MonetizationBooked this month$24,80082% sold
MonetizationPipeline45 deals5 new replies
Upcoming sponsors Next 7 days
| Date | Sponsor | Status |
|---|---|---|
| Today | Northwind Freight | In issue #212 |
| Thu | Lumen Analytics | Creative in |
| Fri | Harbor Payroll | Needs copy |
| Mon | Fieldnote CRM | Paid |
| Tue | Atlas Insure | Invoiced |
Across the desk Live
- MonetizationFieldnote CRM replied to outreach. Deal created.
- MonetizationIO-0193 signed. Slot booked, invoice sent.
- OperationsNorthwind ad placed in issue #212.
- Growth84 Meta signups synced and enriched.
- OperationsDraft for issue #213 ready to edit.
Growth · Last 30 daysOn track
New subscribers3,412+18% vs prior
Cost per subscriber$2.14−$0.40
30-day retention81%+3 pts
From referrals22%+5 pts
Subscribers by source
Daily signups
Recent cohorts Still reading after 30 days
| Signed up | Subscribers | Still reading |
|---|---|---|
| Sep, week 1 | 812 | 84% |
| Sep, week 2 | 774 | 88% |
| Sep, week 3 | 905 | 79% |
| Sep, week 4 | 921 | 83% |
Revenue · Q482% sold
Booked this month$24,800+$4,200 this week
Pipeline45 deals5 new replies
Invoices paid$18,600On time
Open invoices$6,2002 due this week
Prospects 24
Lumen AnalyticsFit 92 · touch 1 of 3Sequenced
Brightline HRFit 88 · researching
Contacted 11
Harbor PayrollOpened twice · touch 2
Cobalt CloudTouch 3 due todayToday
Replied 4
Fieldnote CRMAsked for Q1 ratesHot
ParcelwiseCall booked Thursday
Booked 6
Northwind Freight$4,200 · 2 placementsIO signed
Atlas Insure$2,800 · 1 placementInvoiced
Revenue by month Sponsorships booked
IO-0193 signed by Northwind Freight · dates booked, invoice sentSynced
Illustrative example of an Inkwell-built operator desk. Names and figures are fictional.
Publishers we've worked with
What we build
Less copy and paste. More newsletter.
Most newsletters run on a patchwork of ESP settings, spreadsheets and inbox threads, held together by hand, usually at 6 a.m. on send day. We replace the patchwork with one system built for how you work, so your time goes back into the writing.
Monetization Systems
Outreach that finds sponsors, portals where they build and preview their own ads live, and contracts and invoicing that run without a spreadsheet.
See monetization systemsGrowth Systems
Acquisition tracking, referrals, lifecycle emails and attribution that show which readers stay, with the numbers built into the same system you run every day.
See growth systemsBuilt on the platform you already send from.
We build on every major email platform, and migrate between them when it's time to move.
Logos are trademarks of their owners. Inkwell is independent and not affiliated with these platforms. All platforms
Integrations
Connect your newsletter to the rest of your stack.
We work through the APIs and webhooks of the tools you already pay for. Your ESP, CRM, payments and analytics start talking to each other, and nobody has to be the glue. If a platform move makes sense, we run the migration.
Your system
New event
Issue approved
IO signed
Reply received
ESPBeehiiv, Ghost, Klaviyo
StripeInvoices, subscriptions
CRMHubSpot, Salesforce
SlackTeam alerts
APIs & data
Build on what you already use.
Beehiiv, Substack, Ghost, Klaviyo, Iterable, Sailthru, Resend, Stripe, HubSpot, GA4, Meta and more, connected into one system your team controls.
See operations
Automations
React the moment work changes.
An approved issue schedules the send. A signed IO books the dates and issues the invoice. A sponsor reply lands in your CRM. No copy and paste in between.
See monetization
Case study
One operator. Three issues a week. A complete newsletter operating system.
An independent B2B trade newsletter was running on manual research, spreadsheets and a crowded inbox. We built a pipeline that researches, drafts, checks and schedules every issue, and a desk that handles sponsors, outreach, analytics and growth around it. The editor still reads every issue and presses send.
The production pipeline
- SourcesTrade feeds and public data APIs
- ResearchStories ranked by source quality
- DraftAI writing in house style
- ChecksCitations, grounding, tone
- RenderTemplate and sponsor slot
- Editor reviewHuman approves every send
- SendScheduled in the ESP
The desk around it
- Sponsor CRMPipeline, booking calendar
- Contracts & billingE-signed IOs, Stripe invoices
- OutreachProspecting and sequences
- AnalyticsIssues, subscribers, revenue
- GrowthPaid social, enrichment, ad studio
Who we work with
Built for newsletters of every size.
One person or a whole newsroom, the problem is the same: too much of the work happens by hand. We build to your size and fit into what you already run.
Owner-operators
You write it, sell it and send it. We take the repetitive parts off your plate, from first-draft research to sponsor follow-ups that go out while you write.
- Production pipelines
- Automated sponsor outreach
- One simple desk
Growing teams
Editors, a sales lead, maybe a growth budget. We give everyone one shared desk, so bookings, issues and numbers stop living in five different places.
- Ad operations and billing
- Shared team desk
- Paid acquisition tracking
Media companies and major publications
Many titles, an established stack and a security review. We build tools that plug into your CMS, CRM and data warehouse, and leave what works alone.
- Multi-title workflows
- Platform migrations
- Integrations with your stack
Calculator
What is your newsletter's busywork costing you?
Enter your issues, hours and sponsor slots to see the time a system could free up and the inventory you are leaving unsold.
Run your numbers
Takes about a minute. Every formula shown.
FAQ
Frequently asked questions.
The questions we hear most. Don't see yours? Ask us.
What does Inkwell do?
We're a newsletter software agency. We design and build custom tools for email newsletters: production pipelines, sponsor outreach and ad operations, paid subscriptions, internal tools, integrations and growth tooling.
Who do you work with?
Newsletters of every size, on Beehiiv, Substack, Ghost, Klaviyo, Iterable, Sailthru, Resend and custom stacks. We size the work to your team and fit it into what you already run.
Do we have to replace our email platform?
Usually not. We build around the ESP you already use through its APIs and webhooks. When a move does make sense, we plan and run the migration for you.
How do you use AI in newsletter software?
For the heavy lifting: research, drafts, fact and citation checks, data entry, ad creative and reports. A person approves everything before it reaches a reader or a sponsor.
Who owns the software you build?
You do. Code, data and accounts, from day one, with documentation for whoever works on it next. No proprietary platform, no lock-in.
How long does a custom build take?
Your first working release typically lands within weeks. We ship in small pieces, so your team uses real tools early and each one improves after a real send day.
Partner with Inkwell
Let's build the system behind your newsletter.
Tell us how your newsletter runs today and where the time goes. We'll come back with a plan.