Commerce · alternatives · 2026

24 alternatives to FlatRateKit

Free HVAC flat-rate pricing calculators for small shops

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
SaaS Pricing Calculator▲328
Figure out the right pricing for your SaaS product
2021 · indiebrands.io · its alternatives →
2
Build vs. Buy Calculator▲344
Should you build an internal tool? Or just buy it?
2015 · baremetrics.com · its alternatives →
3
My SEO Sucks Calculator▲257
The ultimate link-building pricing calculator
2021 · its alternatives →
4
EstimateKit▲7
Professional HVAC estimates in 10 minutes, not 2 hours.
Nov 2025 · estimatekit.com · its alternatives →
5
burnrate.fyi▲95
Estimate your SaaS expenses in 5 minutes for free
2021 · burnrate.fyi · its alternatives →
6
Service Pricing Tool▲4
Free calculators for local service costs
Jun 2026 · servicepricingtool.com · its alternatives →
7
HVAC Toolkit▲61
HVAC ToolKit is an easy-to-use app to assist engineers
2023 · hvac.meptoolkit.com · its alternatives →
8
Laser-Shop Pricing API▲62
Instant time & pricing estimation of laser cutting services
2023 · smidyo.com · its alternatives →
9
OpenStartup ▲37
Instant profit & pricing calculator for small businesses
Apr 2026 · openstartup.xyz · its alternatives →
10
SaaS Pricing Calculator by Dodo Payments▲31
Determine your pricing model in 60 seconds
2024 · dodopayments.com · its alternatives →
11
The know ai▲2
Know if you are making or losing money
Jun 2026 · theknowai.com · its alternatives →
12
Estimate how much to charge for your SaaS side project▲37
Find out how much to charge for your side project.
2020 · pricegun.twos.dev · its alternatives →
13
FreelanceKit - Price Calculator▲1
Free tool to price your freelance projects
Apr 2026 · artbyrox.github.io · its alternatives →
14
RateForge▲20
Freelance rates backed by math, not gut feeling.
Jul 2026 · therateforge.com · its alternatives →
15
CommissionKit▲3
Simple commission tracking for teams who hate spreadsheets.
Jun 2026 · commissionkit.co · its alternatives →
16
SoloKit▲2
Invoices, proposals & pricing calculator for freelancers
May 2026 · payhip.com · its alternatives →
17FO
Flexprice: Open-Source Usage-Based Billing Toolkit▲7
Hey HN, I’am Koshima, co-founder of Flexprice (https://flexprice.io/). Flexprice is an open source monetization platform for AI & Agentic companies. You can build usage-based, credit-based, or hybrid pricing models with full control. Usage-based billing works on paper, but breaks fast in production: (1) High-volume data (e.g., 10k API calls/sec from AI inferences) breaks naive pipelines, dropping events and causing underbilling or customer complaints. (2) Backfilling missing events or retroactive discounts screws up invoices, forcing 3 AM log stitching to avoid revenue…
2025 · its alternatives →
18
Designer's Toolkit by Domino Effect▲3
Free pricing and scoping tools built for freelance designers
Apr 2026 · tools.dominoeffect.co · its alternatives →
19
HVAC Tools Hub▲4
Free HVAC calculators and practical reference tools
Aug 2026 · hvactoolshub.com · its alternatives →
20
Pricer AI▲7
Price your AI product with confidence.
Jun 2026 · pricerai.dev · its alternatives →
21
CostKits▲4
Free tools that make healthcare pricing transparent
Jul 2026 · costkits.com · its alternatives →
22
FieldCalc HVAC▲8
Offline HVAC calculator: R-454B PT, superheat, duct, load
Jul 2026 · apps.apple.com · its alternatives →
23
Saas Pricing Calculator▲15
Calculate optimal pricing for your SaaS product
2024 · boilerplatehub.com · its alternatives →
24
AIOptimized Pricing Calculator▲12
Indie App Subscription Smart Pricing Tool
2025 · whop.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →