Stack Cost AI

Bookingenterprise stack.

For each requirement below, pick the option that fits your build — recommended first, then free and cheaper alternatives — or skip what your project doesn't need. Tap the info icon next to any requirement to see why it matters.

Hosting / Compute Platform

Pricing & free-tier limitsVercel Hobby Free $0 100GB BW 6000 edge exec hrs 1000 builds / Pro $20/seat/mo + $40/100GB over $0.18/GB-hr over / Render Free 750hrs sleep / Starter $7/mo 512MB Standard $19/mo 2GB Pro $29/mo + $0.000013/sec over / Fly.io Free 3x shared VM $1.94/mo per 256MB VM $0.12/GB egress / AWS ECS Fargate $0.04048/vCPU/hr + $0.004445/GB/hr ~$35/mo micro EKS $0.10/hr cluster ~$73/mo + Fargate / GCP Cloud Run Free 2M reqs 360k GB-sec $0 + $0.00002400/vCPU-sec + $0.00000250/GB-sec + $0.12/GB egress

Primary Database (PostgreSQL - transactional bookings)

Pricing & free-tier limitsSupabase Free 500MB DB 50k MAU 1GB storage 2GB BW 1 project / Pro $25/mo 8GB DB 100k MAU 100GB BW 100GB storage $0.125/GB DB over $0.0032/MAU over $0.021/GB BW over / Neon Free 0.5GB 100 CU hrs / Launch $19/mo 10GB 500 CU hrs $0.10/CU-hr over Scale $69/mo / AWS RDS db.t3.micro $0.017/hr ~$12.50/mo + $0.115/GB-mo db.t3.medium $0.068/hr ~$50/mo Multi-AZ 2x db.r6g.large $0.288/hr ~$210/mo / Aurora Serverless v2 $0.12/ACU-hr ~$87-350/mo Global DB $0.20/ACU-hr

Object Storage (Property Images, Invoices, Medical docs)

Pricing & free-tier limitsCloudflare R2 Free 10GB 10M Class A 10M Class B zero egress / Standard $0.015/GB-mo $4.50/M Class A $0.36/M Class B egress $0 / AWS S3 Standard $0.023/GB-mo first 50TB $0.09/GB egress $0.005/1k PUT $0.0004/1k GET + Object Lock $0 extra $0.0125/GB retention / Supabase Storage Free 1GB Pro 100GB $0.021/GB over $0.09/GB egress / Backblaze B2 $0/10GB free daily + $0.006/GB-mo + $0.01/GB download

Authentication / User Management

Pricing & free-tier limitsSupabase Auth Free 50k MAU / Clerk Free 10k MAU 5k M2M / Pro $25/mo 10k MAU incl $0.02/MAU over B2B $0.10/org over / Auth0 Free 7.5k MAU 1k M2M / Essentials $35/mo 500 MAU $0.07/MAU over Pro $240/mo 1000 MAU $0.06/MAU over + $0.07/M2M / Okta CIAM Free 25k MAU dev / B2C Enterprise $2500+/mo ~150k MAU Workforce $2/user/mo / WorkOS SSO $125/mo + Directory Sync $0.50/directory Free 1M MAU test

CDN / Edge Delivery & Image Optimization

Pricing & free-tier limitsCloudflare Free unlimited CDN 3 rules $0 1 domain / Pro $20/mo 20 WAF image resizing 5k imgs/mo Polished/Mirage / Business $200/mo 50k resizes custom SSL / Enterprise $2k+/mo unlimited / BunnyCDN $1/mo min $0.01/GB-na + image opt $9.50/10k imgs / AWS CloudFront Free 1TB egress 12mo $0.085/GB first 10TB + $0.0075/10k HTTPS + image via Lambda@Edge $0.60/M / Vercel Image Opt Free 1k / Pro 5k incl then $5/1k

Calendar / Scheduling API - Booking Core [SUBDOMAIN]

Pricing & free-tier limitsCal.com OSS self-host Free $0 unlimited / Free hosted 1 event type unlimited bookings / Platform Starter $15/mo per user unlimited Google sync / Teams $30/user/mo Round Robin collective SAML / Enterprise custom / Cronofy Free dev 50 events / Pro $299/mo 2k events $0.05/event over / Nylas Scheduler Free 100 accts / Starter $125/mo 500 accts Pro $0.30/acct over / Google Calendar API Free 1M queries/day $0 / Calendly Free 1 event type / Standard $12/seat/mo unlimited

Maps / Geocoding / Places API - Location Search [SUBDOMAIN]

Pricing & free-tier limitsMapbox Free 50k map loads 100k MAU 50k geocodes / Starter $50/mo 100k loads $0.50/1k after + $0.75/1k geocode / Growth $300/mo 500k / OSM Nominatim Free self-host $0 / OSM public $0 rate-limited / Google Maps Platform $200 credit/mo ~28k loads then Maps $7/1k Geocoding $5/1k Places Detail $17/1k Autocomplete $2.83/1k / Esri Free 2M tiles $0

Transactional Email API (Booking Confirmations & Reminders)

Pricing & free-tier limitsResend Free 100/day 3000/mo 1 domain / Pro $20/mo 50k $0.0004/email over (extra 50k $20) / Scale $90/mo 300k / AWS SES Free 3000/day if EC2 $0.10/1k else + $0.12/GB attach / SendGrid Free 100/day forever / Essentials $19.95/mo 50k $0.20/1k over Pro $89.95/mo 100k / Postmark Free 100/mo dev / $15/mo 10k $1.80/1k over inbound free / Mailgun Flex Free 100/day trial 3mo / Basic $15/mo 10k

Monitoring / APM / Logging / Error Tracking (Basic)

Pricing & free-tier limitsSentry Free 5k errors 10k txs 1GB attachments / Team $26/mo 50k errors $0.0006/error over 100k txs $0.0002/tx over / Business $26+/seat Pro 100k errors / Better Stack Free 3GB logs 3d / Starter $24/mo 10GB 7d $2.40/GB over / Logtail $0.50/GB over / Datadog APM Free 14d / Pro $31/host/mo APM + logs $0.10/GB ingested $0.10/GB indexed + $1.70/M events / Grafana Cloud Free 10k series 50GB logs 50GB traces / Pro $29/mo $8/1k metrics + $0.50/GB logs

Automated Backups (DB + Storage Versioning)

Pricing & free-tier limitsSupabase Free daily logical 7-day / Pro $25/mo PITR 7-day physical 7-day retention over 2GB $0.03/GB-mo / Neon Free PITR 1-day / Pro PITR 7-day $19/mo Scale 30-day $69/mo / AWS RDS Auto Backup Free PITR 7-day incl / 8-35 day $0.095/GB-mo snapshot cross-region $0.021/GB xfer + copy $0.095/GB-mo / AWS Backup $0.05/GB-mo warm cross $0.02/1k recovery points / pg_dump GitHub Actions Free 2000 mins/mo

CI/CD Pipeline + Code Repository

Pricing & free-tier limitsGitHub Free unlimited public/private repos 500MB packages 2000 Actions mins/mo Linux 500MB storage / Team $4/user/mo 3000 mins + 2GB storage / Enterprise Cloud $21/user/mo 50k mins + 50GB + SAML / Actions extra $0.008/min Linux $0.016 Win $0.08 Mac / GitLab Free 400 mins/mo / Premium $29/user/mo 10k mins / Vercel Auto-deploy incl hosting no extra / CircleCI Free 6k credits/mo ~1k mins Standard $30/mo 30k credits $0.0006/credit over

DNS Management

Pricing & free-tier limitsCloudflare Free $0 unlimited records 1 domain auto DNSSEC unmetered DDoS / Pro $20/mo 20 domains $5/domain extra / Business $200/mo 100 domains 100% SLA custom TTL / Enterprise $2000+/mo unlimited / Route53 Hosted Zone $0.50/mo per zone $0.40/M queries std $0.60/M latency Health Checks $0.50/check/mo Traffic Flow $50/policy/mo

SSL / TLS Certificate Automation

Pricing & free-tier limitsLet's Encrypt Free $0 90-day certs unlimited (300 orders/3hrs) wildcard DNS / Cloudflare Universal SSL Free incl auto renew / ACM $10/mo per zone 100 customs / AWS ACM Public $0 free ELB/CloudFront Private CA $400/mo per CA + $0.75/cert/mo first 1k $0.001/cert-month after / DigiCert OV $218/yr ~$18.16/mo EV $344/yr wild OV $688/yr qty no extra

Caching Layer (Redis - Availability & Session Cache)

Pricing & free-tier limitsUpstash Redis Free: 10k commands/day, 256MB, TLS / Pay-as-you-go $0.20/100k cmds, $0.25/GB bandwidth over, Pro $25/mo 1M/day + 6GB / Redis Cloud Free 30MB / $5/mo 250MB $0.15/10k ops over, $0.15/GB egress, Pro $25/mo 1GB + replica / AWS ElastiCache Serverless Free 14d trial, min $0.046/GB-hr cache ~$35/mo 1GB + $0.20/1M ECPUs + $0.38/M reqs + S3 backup $0.023/GB-mo / Momento Free 5M reads, 1M writes, 500MB

Background Jobs / Queue System (Booking Holds, Expiries, Reminders)

Pricing & free-tier limitsTrigger.dev Free 10k runs/mo 3 concurrent 1GB / Pro $29/mo 50k runs $0.0006/run over unlimited concurrency + 100GB / Inngest Free 50k steps/mo 50k events / Pro $20/mo 250k steps $0.0001/step over / AWS SQS Free 1M reqs/mo then $0.40/M std $0.50/M FIFO + Lambda $0.20/M + $0.0000166667/GB-sec / QStash Free 500 msgs/day / Pro $10/mo 40k msgs $0.20/1k over / BullMQ self-host Free + Redis cost / Temporal Cloud Free 5k actions $10/mo 20k + $0.001/action over

SMS Notification API - Booking Alerts [SUBDOMAIN]

Pricing & free-tier limitsTwilio Free trial $15 credit 1 number trial / PAYG US $0.0079 outbound $0.0075 inbound short code $1k/mo + $0.0075/SMS Copilot $0 / Vonage $0.0476/SMS US number $0.90/mo / Plivo Free + $0.005/SMS US / AWS SNS Free 100 SMS/mo $0.00645/SMS US after + number $0.50/mo / Telnyx $0.0042/SMS + $1/10DLC campaign + $1/number/mo / MessageBird $0.02/SMS US

Pricing & free-tier limitsTypesense Cloud Free trial 0.5GB 100k docs / 1GB $29/mo 2GB $59/mo storage $0.12/GB-mo extra search $0 / Meilisearch Cloud Free 100k docs 10k searches / Starter $30/mo 1M docs 500k searches + $0.03/1k searches over / Algolia Free 10k records 10k search reqs/mo / Growth $1/mo per 1k records $0.50/1k search reqs over Recommend $0.10/1k / Elasticsearch Serverless $0.36/GB ingested + $0.04/hr search ~$28/mo 1 OCU

Secrets Management

Pricing & free-tier limitsDoppler Free 100 secrets 5 users 1k API calls/day / Team $10/user/mo 500 secrets unlimited / Enterprise $20/user/mo HSM + audit $0 over / HCP Vault $0.03/hr cluster ~$21.90/mo + $0.03/1k transits + $0.20/GB-mo / AWS Secrets Manager $0.40/secret/mo + $0.05/10k calls / Infisical Free 1000 secrets self-host $0 / Cloud $19/mo 10k secrets + HSM $0 over / Akeyless Free 1k secrets $0

Uptime Monitoring / Alerting

Pricing & free-tier limitsUptimeRobot Free 50 monitors 5-min no SMS / Starter $7/mo 100 monitors 1-min + 50 SMS / Team $18/mo 500 monitors / Better Stack Uptime Free 10 monitors 3-min / $24/mo 100 monitors 30-sec + 500 SMS credits + $0 over / Pingdom Free 14d / $15/mo 10 checks + $0.15/check over / Checkly Free 10k checks/mo / Pro $29/mo 50k $0.0005/check over / StatusCake Free 10 tests 5-min $0

API Gateway / Rate Limiting / Throttling (Anti-abuse booking)

Pricing & free-tier limitsKong OSS Free self-host $0 / Konnect Free dev 1 runtime / Team $250/mo 6.5M calls + GW + $95/M over + $0.10/10k rate limiting evals / AWS API GW Free 1M calls 12mo / Standard $3.50/M REST + $1/M WebSocket + $1/M msg + WAF $5/mo ACL + $1/rule / Cloudflare Rate Limiting Free 1 rule / Pro 20 rules, Advanced $5/mo per 10k good reqs $0.05/10k over / Unkey Free 2.5k verifs/day / Pro $25/mo 500k + $1/10k over

WAF / DDoS Protection

Pricing & free-tier limitsCloudflare Free WAF 5 custom rules unmetered DDoS $0 / Pro $20/mo 20 rules + managed rules $0 / Business $200/mo 50 rules + custom sets / Enterprise $2000+/mo unlimited + BYO-IP + 24x7 / AWS WAF $0 trial / $5/mo ACL + $1/mo rule + $0.60/M reqs + Bot Control $10/mo + $1/M / Fastly WAF $0 self-host ModSec free / Next-Gen $0.25/M reqs / Imperva CWAF $0 community self-host / Akamai Enterprise $3000+/mo

Bot Protection / CAPTCHA / Abuse Prevention (Scalping)

Pricing & free-tier limitsCloudflare Bot Fight Mode Free + Turnstile CAPTCHA Free unlimited $0 / Pro includes 20 rules / Business 50 rules + bot analytics / Enterprise Bot Management $200/mo min + $0.05/1k good bot reqs / reCAPTCHA Free 1M assessments/mo / Enterprise $1/1k over / hCaptcha Free publisher $0 / Pro $99/mo 1M challenges Enterprise custom / Arkose Labs $0.20/verification Enterprise / DataDome Starter $199+/mo 10M reqs + $0.10/M over

Webhooks / Event Bus (Provider Sync, Calendar Sync, Booking Events)

Pricing & free-tier limitsSvix Free 10k events/mo 7-day retention / Growth $50/mo 50k events + $1/1k over + 30-day retention / Hookdeck Free 100k events/mo 3-day / Team $99/mo 500k + $0.20/1k over / AWS EventBridge Free trial 1M events/2mo, then $1/M custom events + Archive $0.10/GB-mo + Replay $0.10/M / SQS/SNS $0.40/M msgs / Pipedream Free 100 events/day / Pro $19/mo 20k credits + $0.001/credit over

Staging / Preview Environments (Isolated Booking Sandbox)

Pricing & free-tier limitsVercel Preview Deploys Free unlimited previews included, 100GB BW shared / Pro includes team previews + $20/seat no extra / Render Preview envs Free Blueprint / Standard $19/service + PR previews included / AWS Amplify Preview Free 1000 build mins 5GB + $0.01/min over / Railway Preview $0 included usage $0.000231/GB-sec RAM $0.10/GB egress / Coolify self-host Free $0 unlimited staging / Ephemeral via Qovery Free 3 envs / Platform.sh Free trial / $50/mo per env

Payment Gateway - Booking Payments [SUBDOMAIN]

Pricing & free-tier limitsStripe Test mode Free $0 unlimited test bookings / Live 2.9% + 30¢ per successful txn US, Intl +1.5% + Currency 1% extra, Billing $0.5-0.8% recurring ($0 free test), Radar $0.05 screened, dispute $15 / Paddle 5% + 50¢ MoR / Adyen Interchange + 0.60% + 12¢, $0 setup / Braintree 2.59% + 49¢ (Free $50k legacy) / PayPal 3.49% + 49¢, no monthly / Checkout.com Interchange++ $0.15-0.30 + 1.2%

Payout to Providers / Marketplace Payments [SUBDOMAIN]

Pricing & free-tier limitsStripe Connect Test Free: $0 unlimited test accounts, test payouts / Express Standard $0/mo + $0.25/payout (instant 1% min $0.50) + 0.25% + 25¢ per txn Connect fee, Custom $2/mo per acct + 0.25% + 25¢ / Hyperwallet $0.50/payout domestic, $2 intl / Mangopay Free sandbox / 1.8% + 30¢ escrow + $0.50/payout + $0 FX / Persona KYC $1.50/verification over Free 100 checks

Availability / Inventory / Booking Engine API [SUBDOMAIN]

Pricing & free-tier limitsCustom availability engine self-host $0 + Redis $0.20/100k cmds + DB $25/mo / Timekit Free dev 5 users / Pro $89/mo 500 resources $0.15/resource over / Skedda Free 1 venue / Pro $40/mo 1 venue unlimited bookings + API $0.10/booking over / SimplyBook.me Free 50 bookings/mo / Basic $9.90/mo 100 bookings + $0.09/booking over / Cal.com Platform API $0 included, booking engine included no extra / Eversports Booking API Enterprise $500+/mo

Push Notifications API (Mobile & Web Bookings) [SUBDOMAIN]

Pricing & free-tier limitsOneSignal Free 10k subs, 10k emails, unlimited mobile / Growth $9/mo 1k MAU + $0.003/MAU over, Web Push $0, SMS $0.02/msg over / Firebase Cloud Messaging Free unlimited $0 + BigQuery $0.50/M rows + storage $0.50/M / Novu Free 10k events/mo / Pro $30/mo 50k events $0.0006/event over + SMS $0.02 / Knocking self-host $0 or Cloud $0.50/1k notifications / Pusher Beams Free 10k devices 100k pushes/day / Starter $29/mo 10k devices + $0.03/1k pushes over

Fraud Prevention / Risk Scoring [SUBDOMAIN]

Pricing & free-tier limitsStripe Radar Free included + $0.05/risk-scored txn custom / Radar for Fraud Teams $0/mo + $0.05/screened + chargeback 0.4% + dispute $15 / Sift Free 1k events/mo dev / $250/mo 10k orders $0.05/order over / Kount/Riskified Enterprise $1k+/mo 0.3% txn fee / Unit21 Free trial SOC2 / $1k+/mo + 250k rule runs free + $0.001/rule over / Castle Free 5k MAU / Growth $299/mo 25k MAU $0.01/MAU over / Greco self-host Free $0

Tax Calculation API [SUBDOMAIN]

Pricing & free-tier limitsStripe Tax Free test $0 / $0.50 per taxed txn over threshold (US 0.5%, intl custom), first $100k exempt / TaxJar Free 100 API calls trial / Starter $19/mo 1k txns + $0.12/txn over + API $0.07/call over / Avalara Free trial 5 calls/mo / AvaTax $0/mo + $0.25-0.50/txn + $50/mo returns / Quaderno Free 50 txns/mo / Starter $49/mo 500 $0.09/txn over / Anrok Free $0 up to $100k / $199/mo 1k txns + $0.20/txn over

Status Page (Public Booking System Status)

Pricing & free-tier limitsInstatus Free 1 page, 100 subs $0 / Starter $20/mo 1 page 500 subs + custom domain / Growth $60/mo 5 pages + SSO $0 over / Statuspage Atlassian Free 100 subs / Hobby $29/mo 500 subs $0.10/sub over / Pro $99/mo 1000 subs $0.10/sub over / Upptime OSS Free self-host $0 GitHub Actions mins / Better Stack Status Free 1 page / Pro $24/mo 500 subs + $0.06/sub over

Feature Flags Management (Gradual Booking Rollouts)

Pricing & free-tier limitsLaunchDarkly Free 1k MAU + 1k seats 1 env / Starter $10/mo 1k MAU $0.02/MAU over + 2k events / Pro $20/seat/mo 10k MAU + $0.001/event over + experimentation + $0 after / Flagsmith Free self-host $0 / Cloud Free 5k API + 50k flag evals / Startup $75/mo 50k evals $0.0001/eval over / Unleash OSS Free self-host $0 / Cloud Free 15k reqs, Pro $80/mo 100k reqs $0.0008/req over / GrowthDay custom

Security Scanning / SAST / Dependency Audit / Secrets Scan

Pricing & free-tier limitsGitHub Advanced Security Free public / Team $22/user/mo CodeQL + Dependabot + secret scanning $0 over public / Enterprise $49/user additional + push protection / Snyk Free 200 tests/mo 1 project / Team $25/dev/mo 10k tests + container $0.02/test over / Semgrep Free 10 devs OSS / Team $40/dev/mo commercial $0.15/finding over / Trivy Free OSS $0 / SonarCloud Free 100k LoC / $150/mo 500k LoC

Pricing & free-tier limitsCookieYes Free 100 page scans, 1 domain $0 / Starter $8/mo 10k pages + IAB TCF 1 domain / Pro $20/mo 50k pages / Didomi Free trial 100k PV / Starter $199/mo + $0.10/1k PV over / OneTrust Cookie Consent $0.20/1k PV Enterprise $300+/mo / Usercentrics Free 50k sessions/yr $0 / Consent $0.001/session over / Osano Free 5k visitors/mo / Growth $49.99/mo 50k + $0.001/visitor over / DataGrail Free inventory + DSR trial / Enterprise $2000+/mo

Disaster Recovery / Failover / RTO/RPO (Zero-downtime bookings)

Pricing & free-tier limitsVercel Rollback Free instant rollback $0 / AWS Route53 Failover $0.50/health check/mo + $0.50/query over + Backup cross-region $0.021/GB xfer + S3 CRR $0.09/GB egress + snapshot $0.095/GB-mo / AWS Backup $0.05/GB-mo warm, cross-account $0.02/1k points / Cloudflare Load Balancing Free? Actually LB $5/mo min + $0.50/health check + $5/1M reqs / Zerto Enterprise $1k+/mo per VM / Velero OSS Free self-host $0 + storage $0.023/GB-mo / Resilience Hub Free assessment

Multi-region Deployment / Global Replication (Low-latency bookings)

Pricing & free-tier limitsFly.io Multi-region $0 extra (same VM $1.94/256MB + egress $0.12/GB) / Cloudflare D1 + R2 Global Free tier global repl included $0 + $5/M reads over / AWS Aurora Global DB additional cluster $0.12/ACU-hr + CRR $0.20/GB egress x 2 regions / DynamoDB Global Tables $1.25/WCU + $0.20/GB repl / CockroachDB Serverless Free 10M RUs, $0.10/1k RUs over, Self-host Free $0 / PlanetScale Free 5GB 1B row reads/mo / Scaler $39/mo 10GB + $0.0015/1M reads over + $15/region extra

Audit Logs (WORM / Immutable / HIPAA Compliance)

Pricing & free-tier limitsSupabase Audit Free pgAudit ext $0 / Pro audit 7-day retention included, 30-day export to S3 $0.023/GB-mo / AWS CloudTrail Free first trail mgmt read free, data $0.10/100k events + S3 $0.023/GB-mo Object Lock WORM $0 extra + retention / WorkOS Audit Trail Free 10k events / Starter $50/mo 100k $0.0005/event over / Axiom Free 500MB logs 30-day $25/mo 30GB + WORM / Datadog Audit $0.10/GB ingested

PAM / IAM Governance + SOC2 / HIPAA Controls (For Healthcare Bookings)

Pricing & free-tier limitsAWS IAM Free $0 always / IAM Identity Center Free $0 + MFA $0 / Okta Workforce $2/user/mo + MFA $0.50/user over + PAM $30/user/mo + governance $6/user over / Auth0 Enterprise $1500+/mo + $0.06/MAU over / Teleport Community Free self-host $0 / Team $20/user/mo cloud + SSO + PAM $50/user/mo / Vanta Free trial 7d / Growth $3000/yr + $150/user/mo + SOC2 audit $2k + HIPAA $5k/yr / Drata Starter $2500/yr + evidence $0 / CyberArk Conjur OSS Free / Enterprise $1000+/mo

Options and prices come straight from our research sheets for a enterprise booking project. Prices are estimates and change often — always confirm on the provider's page before committing.

How this enterprise booking checklist works.

Each requirement below is something a enterprise booking build typically needs. Pick one of the four researched options — recommended, free, cheaper or paid — add your own with "Other", or skip the requirement if your project doesn't need it. Nothing is mandatory; the plan on the right tracks what you've decided so nothing gets forgotten.

Your picks are saved in this browser automatically, so you can come back anytime. Options are researched per build level and refreshed as vendors change their plans — always verify details on the provider's page before committing.