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TaxJar (by Stripe)
Long-established self-serve option, now inside Stripe. Filing is credit-limited.
Best forStripe-native and SMB ecommerce sellers
Not forHigh-volume or complex multi-channel operations
What it does
- CalculationYes
- Registration[VERIFY] No
- Filing & remittance[VERIFY] Capped
- Notices & audit[VERIFY] Self-serve
- Marketplace tax[VERIFY]
Pricing
- Entry[VERIFY] $19-99/mo depending on tier — a 2026 increase was widely reported
- Per filing[VERIFY] AutoFile credits, extra purchasable
- Per registration[VERIFY] No
- Setup & overage[VERIFY] filing credits cap the plan; confirm the 2026 pricing directly
Integrations
- ChannelsShopify, WooCommerce, Amazon, BigCommerce, Magento, QuickBooks
- Depth[VERIFY] Native app
Onboarding and terms
- Time to first filing[VERIFY] quick for basic setup
- Contract[VERIFY]
- Who pays a penalty[VERIFY]
- Support[VERIFY] self-service; support quality complaints post-acquisition
Rating
[VERIFY] 4.7/5 · [VERIFY] re-pull count and date
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Sovos
Enterprise, compliance-heavy, international. Runs its own Avalara-alternative page.
Best forRegulated industries with multi-country compliance needs
Not forUS-only ecommerce sellers — the breadth is cost you will not use
What it does
- CalculationYes
- Registration[VERIFY]
- Filing & remittance[VERIFY]
- Notices & audit[VERIFY] Add-on
- Marketplace tax[VERIFY]
Pricing
- Entryquote-only
- Per filing[VERIFY]
- Per registration[VERIFY]
- Setup & overage[VERIFY]
Integrations
- Channels[VERIFY] enterprise ERP connectors
- Depth[VERIFY]
Onboarding and terms
- Time to first filing[VERIFY]
- Contract[VERIFY]
- Who pays a penalty[VERIFY]
- Support[VERIFY]
Rating
[VERIFY] · [VERIFY]

Zamp
Fully managed service where a tax team handles registrations, filings and notices end to end.
Best forEcommerce and SaaS brands wanting compliance fully handled
Not forTeams wanting self-serve signup without talking to sales
What it does
- CalculationYes
- RegistrationIncluded
- Filing & remittanceIncluded
- Notices & auditIncluded
- Marketplace tax[FILL] how marketplace-collected tax is reconciled
Pricing
- Entry[FILL] a real entry number or an explicit pricing model — not blank
- Per filing[FILL]
- Per registration[FILL]
- Setup & overage[FILL] setup fee and what triggers overage
Integrations
- ChannelsShopify, Amazon, BigCommerce, Adobe Commerce, NetSuite, QuickBooks
- DepthNative app
Onboarding and terms
- Time to first filing[FILL] weeks to first filing
- Contract[FILL]
- Who pays a penalty[FILL] who pays a late or wrong filing — state it plainly
- Support[FILL] named human, SLA if you publish one
Rating
[VERIFY] 4.7/5 · [VERIFY] 47 reviews · G2 · re-pull and date it
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Avalara
The category incumbent. Broadest coverage, heaviest setup, opaque pricing.
Best forEnterprises and large mid-market with broad tax-type needs
Not forSMBs — cost and implementation overhead outweigh the coverage
What it does
- CalculationYes
- Registration[VERIFY] Per-state fee
- Filing & remittance[VERIFY] Add-on
- Notices & audit[VERIFY] Add-on
- Marketplace tax[VERIFY]
Pricing
- Entryquote-only
- Per filing[VERIFY] $42-65 per filing
- Per registration[VERIFY] $349-403 per state
- Setup & overage[VERIFY] implementation $2,500-50,000 per third-party aggregators
Integrations
- ChannelsShopify, BigCommerce, WooCommerce, NetSuite, SAP, Salesforce
- Depth[VERIFY] Native app + API, 1,400+ claimed connectors
Onboarding and terms
- Time to first filing[VERIFY] often needs an implementation partner
- Contract[VERIFY]
- Who pays a penalty[VERIFY]
- Support[VERIFY] dedicated account manager on higher tiers
Rating
[VERIFY] 4.0/5 · [VERIFY] 700+ reviews · G2 · Apr 2026 — re-pull and date it

