Two-way SMS: send to everyone, hear from everyone.

Name: whoot. SMS Recipient Lists
Brand: whoot.
Availability: InStock

SMS built for a conversation, not just a broadcast. Reach every person on your list, no app and no data connection needed, then get their replies back in one place, right beside your voice channels. Always-on recipient lists for incident comms and Martyn's Law, priced by how many people you need to reach.

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People seated in an audience reading their phones, seen from behind — Any phone, no app.

From £39 a month, +VAT
Send and reply, built in
From 25 recipients
Self-serve to 5,000 recipients

Sheet 1Two-way SMS · RRP, ex VAT · Monthly

Both ways

Replies

An alert is only half the conversation.

The easy part is sending. The part that matters is what comes back. A one-way blast tells you what you said; a reply tells you what is happening on the ground: who is safe, who needs help, who is already moving.

whoot. SMS is two-way by design. Recipients reply straight from their phone’s Messages app, and every response threads back to your team next to your voice channels: one number, one list, both directions.

Reaches any phone: No app to install, no data connection needed. If they carry a mobile, your message lands in their normal Messages inbox, and texts get read fast.
It talks back: Recipients just reply from their standard Messages app. Every response threads back into whoot., right beside your voice channels.
Know who is OK: A blast only tells you what you sent. Replies tell you what is actually happening: who is safe, who is stuck, who is already on their way.
One list, both ways: Send and receive on one number and one list. No separate inbox to babysit: the people you alert are the people you hear back from.

Capacity

Price

Pay for the people you can reach.

You choose a capacity, the number of recipients your lists may hold, and the monthly fee keeps that many people live and reachable both ways. It pays for readiness, not consumption. Every capacity includes a pooled monthly allowance you spend sending or receiving. Prices are RRP, ex VAT.

SMS capacity price points
Capacity	Included / month	Monthly fee	Per recipient
25 recipients	200 segments	£39 / mo	£1.56 +VAT
50 recipients	250 segments	£59 / mo	£1.18 +VAT
100 recipients	450 segments	£99 / mo	£0.99 +VAT
250 recipients	1,000 segments	£189 / mo	£0.76 +VAT
500 recipients	2,000 segments	£309 / mo	£0.62 +VAT
1,000 recipients	4,000 segments	£549 / mo	£0.55 +VAT
2,500 recipients	10,000 segments	£1,269 / mo	£0.51 +VAT
5,000 recipients	20,000 segments	£2,469 / mo	£0.49 +VAT
5,000+ recipients	Custom pool	Custom	Enterprise quote +VAT

These are reference points, not bands. Any capacity from 25 to 5,000 recipients is sold, in steps of 10 below 250 and 25 above, and the price sits on a straight line between the points: 600 recipients is £357 a month, not the price of 1,000.

Overage, either direction: £0.085 / segment +VAT
Cap it if you like: a per-workspace toggle stops SMS at the pool
Rollover: none; the allowance is monthly

Segments

How usage is measured

Billed by the segment, both ways.

You are billed by the segment, not the message, and a reply counts exactly the same as a send. Here is what a segment is, and how to keep two-way volume predictable.

GSM-7, plain text: 160 chars for 1 segment · 153 a segment when split
UCS-2, rich text: 70 chars for 1 segment · 67 a segment when split

GSM-7 is A to Z, 0 to 9 and basic punctuation: the default, and where to keep messages. Any emoji, a curly quote, or an accented or non-Latin character makes the whole message UCS-2.

Worked examples: four messages and their segment counts
Message	Encoding	Characters	Segments
Short plain alert, outbound“Evacuate now. Proceed calmly to Assembly Point B.”Under 160 plain characters: one segment.	GSM-7	49	1
Longer plain alert, outbound“Security incident at the north entrance. Evacuate now via the south and west exits, do not use the lifts, and follow your floor warden's instructions to Assembly Point B.”Past 160, so counted at 153 characters a segment. Note the straight apostrophe.	GSM-7	170	2
Same message, one smart quote“Security incident at the north entrance. Evacuate now via the south and west exits, do not use the lifts, and follow your floor warden’s instructions to Assembly Point B.”A single curly ’ flips the whole message to UCS-2: 67 characters a segment.	UCS-2	170	3
A reply coming back, inbound“Safe and accounted for at Point B.”Replies are metered the same as sends: one segment here.	GSM-7	34	1

Examples two and three are the same words at the same length, but a single curly quote, the kind autocorrect inserts, instead of a straight one takes them from two segments to three. One special character flips the whole message to UCS-2. The cheapest way to keep costs down is to keep messages plain text.

Sizing

The pool

Responses come back on the web; the pool goes on alerts.

Every alert carries a response link. People answer on the response page, so a full-list alert costs only the outbound text. A text reply, if someone sends one, is metered like any other segment. Each capacity’s allowance covers about four segments per recipient a month: a welcome text and one or two full-list alerts, drills included.

Outbound · 2 × 250: 500
Responses · on the response page: 0
One full-list alert: 500 segments

The 250 capacity includes 1,000 segments: 2 full-list alerts a month before any overage. Test sends draw from the same pool.

End of sheet 1Back to the top

The fee pays for readiness, not consumption.

The monthly fee keeps up to your capacity live and reachable, both directions, whether or not anything happens. The included allowance covers the messages you send and the replies you receive. It is a flat pool per workspace and does not scale with the number of seats.

Always-on reachability: readiness for Martyn's Law, not per-use billing
Pooled, flat per workspace: one shared monthly allowance
Both directions count: sends and replies draw from the same pool
Costs you control: £0.085 a segment beyond the pool, or cap it entirely

More than 5,000 recipients?

Above 5,000 recipients we build a custom package, sized around your list and expected volume. Not sure which capacity fits your list? We will size it with you.

Talk to us

Sheet 2Questions · Sign-off

FAQ

Questions

Two-way SMS, answered.

Why two-way SMS and not just alerts?: Because a broadcast only tells you what you sent; the replies are where the value is. Two-way SMS lets you see who is safe, who needs help and who acknowledged. whoot. SMS is two-way by design: recipients reply from their normal Messages app and every response comes back to your team, beside your voice channels.
Do recipients need the whoot. app?: No. SMS reaches any mobile phone with no app to install and no data connection required. Recipients receive your message and reply in their standard Messages inbox, and the whole exchange still lands back inside whoot. for your team to act on.
What am I actually paying for each month?: Always-on reachability of up to your capacity, in both directions. The monthly fee keeps your list live and ready; the included allowance covers the messages you send and the replies you receive. It is a flat pool per workspace and does not scale with the number of user seats.
How is usage measured?: By the segment, in both directions. A segment is 160 characters of plain text (or 70 if the message contains an emoji, a curly quote or accented characters), and longer messages use more than one. Sends and replies both count. The worked breakdown is in how usage is measured.
What happens if I go over my allowance?: You keep sending and receiving. Overage is a flat £0.085 per segment +VAT, in both directions, whatever your capacity: no surprise cut-offs. Prefer a hard stop? Toggle overage off in billing and SMS pauses at your included pool until next month.
Does the allowance roll over?: No. The pool is monthly and use-it-or-lose-it, and test sends draw from the same pool, so factor your drills in when you pick a capacity. The allowance is sized for link alerts, about four segments per recipient a month, because responses come back on the response page rather than by text.
What if I have more than 5,000 recipients?: Above 5,000 recipients we build a custom package, sized around your list and expected volume. Talk to us

Today

You

Reach your whole list. Hear every reply.

Add an SMS recipient list to your workspace in minutes: always-on, two-way, and ready before you need it.

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