The fundraising operating system

Raise smarter.
Run tighter.

The first software designed to run a fundraise — not just the parts of it. One workspace that quietly walks you through best practice from the first SAFE to the closing wire.

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SEED · 2026
Round in progress
$1.15M / $3.00M
$0$1M$2M$3M
SIGNED
Catalyst Fund
$500K
SIGNED
Sequence Ventures
$250K
DILIGENCE
Northbeam Capital
$750K
DILIGENCE
Atlas Partners
$500K
38% COMMITTED4 SAFES · 7 ACTIVE
What you'll be looking at

Tools that show their work.

A close-up on four of the ten surfaces. Each is one click apart, with shared context and Ask Arx across them.

01 · Investors list

A pipeline built for the raise.

Stages an advisor would draw — outreach, first call, diligence, committed, signed. Every fund carries a unique introduction path: map the advisors and existing investors who can warm-intro you, and share a single link with whoever you need to ask.

Explore the CRM →
PIPELINE · 48
Seed round · 2026
Outreach
18
Halo VCIconiq+16
First call
12
SequenceFoundry
Diligence
7
NorthbeamAtlas
Signed
4
CatalystLinen
Intro path · Northbeam
Mira (Atlas) → Sasha Kim · 1 mutual · share link copied
Share →
02 · Pitch deck

A deck that shows its work.

Upload the PDF, share one link, see who lingered on slide seven. Per-page dwell heatmap, viewer-level identity gate, optional password, version history that doesn't break the URL. Add a single contact button so partners can reply to the deck — not to a stranger's inbox.

See the analytics →
SEED DECK · v14
Sasha · Northbeam · 4m 22s reading
01
Cover
02
Problem
03
Why now
04
Product
05
Traction
06
Market
07
Team
08
Ask
CONTACT"Reply to Elena" · button on every page142 views
Views
142
Avg dwell
3:48
Versions
14
03 · Data room

A room that stays current.

Not a folder of stale PDFs. Pitch deck and cap table link into the room as linked materials — re-upload the deck and the room reflects the latest. Mix files with external links, gate access by email, and watch the activity log roll in.

Tour the room →
ROOM · NORTHBEAM
Diligence packet · last opened 14m ago
XL
Financial forecast● LIVE
Synced from Forecast · v6 · updated 22m ago
22m ago
28
PDF
Cap table — pro forma● LIVE
Synced from Cap Table · post-money $14M
1h ago
17
PDF
Pitch deck — current● LIVE
Synced from Deck · v14
2h ago
142
PDF
Customer reference letters
Access by email · revoke per investor
3d ago
6
Public roadmap (Linear) — external
Live link · revoked on close
5d ago
9
Loom — founder walkthrough
14:22 · 47 views across 3 funds
9d ago
12
04 · Forecast

A model with drivers, not guesses.

You don't know the future. You don't need to. Move headcount, cost of acquisition, ARPU, churn — Arx derives revenue, runway and the post-money you can defend. Then it scores you against seed-stage SaaS benchmarks, the way a partner does.

Open the model →
FORECAST · v6
5-year P&L · scenario · base
'26'27'28'29'30
Headcount · '27
18 +6
ARPU · base
$1,820 /mo
CAC payback
11.4 mo
Runway · post-raise
22.5 mo
Benchmark
Rule of 40 reads 52 — top quartile seed SaaS. Investors will ask about it.
05 · Ask Arx

An assistant that does the work, not just answers.

Trained on the best fundraising writing and operator practice. Reads your pipeline, deck views, model and inbox. Drafts updates, adjusts the forecast, qualifies new funds — through the app, or through Claude via MCP, from anywhere you already work.

Meet the assistant →
ASK ARX
Today · 3 actions taken
"Who's gone cold in the last 14 days?"
Three to chase, gently.
Northbeam opened the deck three times last week — and hasn't replied since. Atlas asked about ARPU on Mar 4 and we haven't followed up. Charge VC hasn't seen the cap table you exported four days ago.
SK
Northbeam · Sasha Kim
3 deck views last week · no reply
DRAFT REPLY
MR
Atlas · Mira Rao
Asked re ARPU 18d ago · unanswered
DRAFT REPLY
·PIPELINE·DECK ANALYTICS·GMAIL·CLAUDE MCP
Why we built this

Tools give you instruments.
Arx gives you a process.

Six SaaS subscriptions know nothing about each other. Arx replaces the patchwork — and adds the part that's missing: an opinion on what comes next.

Carta
Cap table
$240/mo
DocSend
Deck · room
$45/mo
Notion
Investor CRM
$10/mo
Calendly
Bookings
$12/mo
Causal
Forecast
$129/mo
Arx
Everything · one bill
$99/mo
The Arx playbook

A round, in eight steps.

Arx walks you through the eight phases of a modern early-stage round — and quietly tells you what's missing, who's stalled, and what to send next.

01

Set the brief

Workspace
$3.0MSEED · 2026
Lead profile · Stage · Sectors
02

Build the pipeline

Investors · 48
CSV in+ INTRO PATHS
03

Ship the deck

Deck · v14
142VIEWS · 32 VIEWERS
● Slide 5 is the hook
04

Take the meeting

Bookings
9 bookedTHIS WEEK
Tue 14:00 · Sasha Kim
05

Open the room

Data room · 4 open
Northbeam● 28 VIEWS
Cap table · linked
06

Model the round

Cap table
22.4%DILUTION
Post · $14.0M
07

Send updates

Investor updates
May '26SENT TO 38
● 82% open · 6 replies
08

Close the wire

SAFEs · 4 signed
$1.15M38% COMMITTED
Wire confirmed · Catalyst
Tour every feature →Read the full playbook
"

I used to fundraise across six tabs and a notebook. With Arx, the pipeline, the deck, the room and the model all answer to the same question.

A founder · seed, $2.4M closed in Q1

Begin here.

One workspace. One subscription. The years before bigness, walked through step by step.