The fundraising operating system

Your raise,
in one place.

The first software designed to run the entire fundraise, not just the parts of it. One workspace to manage your investors list, cap table, financial forecasts, data room, and everything in between.

14-day free trialCancel anytimeSecured by Stripe
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.

Each is one click apart, with shared context. Use Arx AI to ask questions and make changes.

01 · Investors list

A pipeline built for the raise.

Every fund has an intro path: map the advisors and existing investors who can warm-intro you. Share your list, prep an intro request template and send it in one click.

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. Add a single contact button so partners can reply to the deck as soon as they view it.

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.

Pitch deck and cap table stream into the room as linked materials. Changed the deck? The room shows 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 forecasts the growth you can defend. Then it scores you against industry 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 and operator practice. Reads your pipeline, deck views, model and inbox. Drafts updates, adjusts the forecast, and provides suggestions through the app, or through Claude via MCP.

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
PipelineDeck analyticsGmailClaude MCP
Why we built this

Tools give you instruments.
Arx gives you a process.

Six subscriptions know nothing about each other. Arx replaces the patchwork and adds the missing part: a structured approach that gets you to the next step.

Carta
Cap table
$240+/mo
DocSend
Deck · room
$45/mo
Attio
Investor CRM
$29/mo
Calendly
Bookings
$12/mo
Runway
Forecast
$500+/mo
Visible
Investor updates
$79/mo
Arx
Everything · one bill
$99/mo
$9,000+ saved annually
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.

FOUNDER · SEED, $2.4M CLOSED IN Q2

Your fundraise begins here.

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