Business calls, texts, and voicemails

Sound professional & stay connected.

Numberline is a virtual phone system for small businesses. Get a local or toll-free number with greetings, extensions, and calls that reach your mobile, your team, or a connected AI agent. Manage business texts and WhatsApp in one inbox, with notifications in Slack.

Get early access See how it works
  • No per-user pricing
  • Money-back guarantee
  • No long-term contracts
  • Free support
From the team featured in
CNBCCNNForbesInc.The New York TimesThe Wall Street JournalTechCrunchEntrepreneurLos Angeles TimesThe Boston GlobeFox Business

Everything a business phone system should do.

Give customers a professional business number, then ring your mobile, route to your team, and keep texts and voicemails in one place.

Extensions forward to your mobile

Sales, Support, Billing, or personal extensions, each ringing where you decide. Create them, then forward them anywhere.

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Ring any phone

Your mobile, your team’s mobiles, or an existing business phone, in order or all at once.

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Get alerts anywhere

Voicemail recordings and transcripts by email on every plan. Missed-call, voicemail, and text notifications in Slack on Grow and Max.

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WhatsApp built in

Let customers message your Numberline number through WhatsApp, delivered to your inbox.

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Slack notifications

Get missed-call and voicemail notifications in the channels you watch, then open Numberline to read and call back. Grow and Max.

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Connect AI agents

Let a connected AI agent answer sales inquiries, collect customer details, or handle calls when your team is busy.

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Send each call to the right person or AI agent.

Let your sales agent collect new customer inquiries while support calls ring your team. Choose who answers each extension and what happens when nobody is available.

How connected AI agents work → How call routing works →

Call & text from your business number on the phone you already use.

Use your existing mobile phone to call and text customers while showing your business number instead of your personal number. No second phone required. Get a second phone number for your business →

  • Show your business caller ID when you call
  • Keep your personal number private
  • Use the mobile phone you already have
  • Route incoming calls to you or your team
Calling…
NC
New customer
(646) 555-0117
You're calling from
Your mobile
Customer sees
Your Business(212) 555-5225

Answer SMS & WhatsApp messages from one shared inbox.

Customers can message your business number by SMS or WhatsApp, and both land in the same inbox. Everyone who needs access can see the conversation and reply without another seat fee. WhatsApp is included on Grow and Max. How WhatsApp works with your number →

Messages
Search messages
New
Inbox
Archived
RM
Rosa Méndez9:42 AM
You: Hi Rosa! We have 10:30 AM open this S…
LocalUnassigned
DO
Daniel Okafor9:36 AM
My morning meeting might run long. Thanks!
LocalUnassigned
+1 (404) 555-1199Yesterday
You: Hi Grant, following up on your billing q…
LocalML Assigned to Mara
+1 (978) 555-7745Yesterday
Tuesday works great, thank you!
LocalBS Assigned to you
+1 (978) 555-7745
Maybe Priya Shah
Call BS Bob Resolve
Internal notePrefers text over a phone call.Expand
Yesterday
You
Hi Priya, returning your call. Happy to set up a first visit. What days work for you?
Read · Yesterday 1:34 PM
Tuesday works great, thank you!
Templates Photo Schedule
Text your reply…
Replying from Local · (617) 555-0100

Get missed-call & voicemail alerts in Slack.

Get missed-call, new-text, and voicemail notifications in the channels your team already watches, then open Numberline to read the message and call back. Included on Grow and Max.

See Slack notifications →

#support Slack
N
NumberlineAPP2:14 PM

New voicemail · Miguel Cruz · Ext 2 Support

New voicemail, 0:34. Open Numberline to listen, read the transcript, and call back.

N
NumberlineAPP4:02 PM

Missed call · (415) 555-0147 · Ext 2 Support

No voicemail left. Call back from the business number.

Simple pricing. No surprises.

No per-user pricing

Add your whole team without changing the price.

No long-term contracts

Stay because Numberline works, not because a contract says so.

Free support

A real person owns the problem until it is resolved.

Built to keep your business connected.

99.5%Uptime target*
Independent call routingCalls keep forwarding if the app is unavailable.
Real human supportSomeone owns your issue through resolution.

Our reliability commitment →

*Terms defined in our service-level agreement, published at launch.

Get your business phone number & start forwarding calls.

Start with a business number ringing your mobile, then add extensions, teammates, and tools. Unlimited users at one price.

Get early access
Money-back guarantee No long-term contracts