Plain

Plain Horizon extra seat

Additional Horizon seat at $99/seat/month billed yearly beyond the 3 seats included in the Horizon base. Seat overage only—not multiplying the $299 base package.

Usage calculator

List prices are stored in US dollars. Conversions use the units-per-dollar exchange-rate snapshot last checked 2026-07-31

Published unit price
$99.00
Estimated cost
$99,000.00

Project monthly volume

Estimated daily cost
Estimated monthly cost

Cost by usage volume

The table includes intermediate steps such as 25, 50, and 250 units, so you can inspect growth between large round-number bands.

Usage volume Estimated cost
1 $99.00
10 $990.00
25 $2,475.00
50 $4,950.00
100 $9,900.00
250 $24,750.00
500 $49,500.00
1,000 $99,000.00
2,500 $247,500.00
5,000 $495,000.00
10,000 $990,000.00
25,000 $2,475,000.00
50,000 $4,950,000.00
100,000 $9,900,000.00
250,000 $24,750,000.00
500,000 $49,500,000.00
1,000,000 $99,000,000.00
5,000,000 $495,000,000.00
10,000,000 $990,000,000.00

Cost profile

  • The published rate is $99.00 per Horizon extra seat-month (yearly).
  • One thousand units cost $99,000.00; 100,000 units cost $9,900,000.00 before allowances, tiers, or other billing components.
  • A $100 budget covers about 1 units at this linear rate.

About Plain

B2B support platform with published Foundation and Horizon package rates (yearly billing). The Plain Horizon extra seat page covers this meter in detail; the Plain hub gathers the rest of the lineup with a pricing table, list-rate ranges, and calculators side by side.

See Plain services, APIs, and the pricing table

This calculator applies the published unit rate linearly. Included quotas, tiered prices, minimum commitments, regional charges, and other billing components may change the actual total.

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