Pick ExpressNumber if you want 5 numbers for less than one Sideline line.
Sideline's monthly plan is $14.49 in the App Store for one second number. Basic is $9.99 a month for 5 numbers, Pro carries 100, and the first 7 days are free.
Sideline alternative
ExpressNumber vs Sideline
ExpressNumber gives you 5 numbers for $9.99 a month that ring the phone you already carry. Sideline sells one second number for $14.49 a month in the App Store. Here is the rest, with their prices read off their own listing.
$0 today
Line by line
| Feature | ExpressNumber | SidelineAs published on their site |
|---|---|---|
| What it costs | $0 today and for 7 days. Then Basic is $9.99 a month, Pro is $29.99 a month. | $14.49 a month in the App Store, or $129.99 a year. Pro is $14.99 a month. |
| Numbers on one plan | Yes. 5 or 100 numbers on one plan. Extra numbers are $1 a month on Basic, 50 cents on Pro. | No. One second number on your smartphone. |
| Calls reach the phone you already carry | Yes. Forwarded to the mobile you verified, ringing like any other call. The caller only ever sees the burner. | Yes. Calls ring in the Sideline app on your smartphone, over your carrier network rather than the internet. |
| Calls and texts out | No. Receive-only. Our numbers take calls and texts, and they never make them. | Yes. Calls and unlimited texts from the second number. |
| Runs in a plain browser | Yes. No app. Numbers are managed in the browser, and calls ring the phone you already have. | Partly. App first, with web messaging on its site. |
Read from Sideline's App Store listing and sideline.com on October 19, 2026. Prices move: check before you buy.
Our minutes count forwarded calls only, rounded up to the minute, and inbound texts are never billed. Past your monthly allowance, forwarded minutes are 5 cents each, capped at $50 a month on Basic and $100 on Pro.
This is ExpressNumber on a phone.
- Calls and texts still reach the phone you already have.
- 5 numbers on Basic, each set to forward, take texts only, or block.
- Burn any number in one tap when it starts ringing.
9:41
Your numbers
Marketplace
(415) 555-0142
Forwarding
Dating
(212) 555-0166
Texts only
Car dealer
(305) 555-0118
Blocked
Rentals
(646) 555-0187
Forwarding
Deliveries
(332) 555-0168
Forwarding
Two products, two different jobs.
Sideline sells one second line, and we sell a set of numbers
Sideline puts one extra number on your smartphone, and it calls and texts out. ExpressNumber gives you 5 numbers on Basic and 100 on Pro, which receive calls and texts and forward them to the phone you already have.
A number per site turns the leak into a receipt
Give the dealership one number and the gym another. When one of them starts ringing at 7am you know exactly who sold you, and you burn that number on its own. Every other number you handed out keeps working.
Try it for a week before you pay
Both plans start with 7 days free and $0 today. Put the number on the next form that asks for your phone number and watch who calls it.
Keep comparing
Try it for a week. Judge it yourself.
Hand out a number you can burn. Keep the one your family calls.
Try it free for 7 days