Invofox Self Serve does document extraction — pulling structured data out of invoices and other files with a 99% accuracy guarantee backed by an SLA. It has a free tier (500 pages) and paid plans starting at $500/month billed annually, with usage-based pricing and volume discounts; you only pay for correctly extracted pages, since incorrect extractions are credited back.
If that starting price is too high, here are four alternatives, ordered from cheapest stated price up.
| Product | Free tier | Starts at | Best for |
|---|---|---|---|
| Invoices Reader | Yes (10 invoices) | $3/mo | Small volumes, budget-conscious teams |
| NexaAlign | Yes | Not stated | Teams wanting template-free invoice OCR |
| OpenEnvoy Extract | Yes (800 tokens) | Not stated | Teams testing a 100%-accuracy SLA claim |
| ExtractDoc | Yes (100 credits) | Not stated | General document extraction automation |
Invoices Reader
Invoices Reader (site) automates invoice data entry using a hybrid of local and cloud AI processing. It suits individuals and small businesses with modest invoice volumes who want a low monthly cost rather than usage-based enterprise pricing. The free tier covers 10 invoices total, and paid plans start at $3/month for the Starter tier (100 invoices/month); there's also a separate one-time desktop app option. Limitation: at 100 invoices/month on the entry plan, higher-volume teams will need to check how pricing scales before committing.
NexaAlign
NexaAlign (site) offers deterministic invoice OCR and extraction without relying on templates, which suits teams dealing with varied invoice formats. It includes a free tier to try the service. Limitation: no paid plan pricing is published anywhere on the site, so you can't compare true cost against Invofox without contacting them directly. It launched in February 2026 and is still early, with no launch-day votes recorded yet, so there's limited independent signal on how it performs at scale.
OpenEnvoy Extract
OpenEnvoy Extract (site) claims to extract every field from any file with 100% accuracy and a touchless, zero-setup process, backed by its own SLA — a direct positioning against accuracy-guarantee tools like Invofox. It suits teams wanting a free trial before committing. The free tier gives 800 tokens, and paid plans (Essentials, Scale, Enterprise) use fixed token-based pricing. Limitation: no USD figures are published, so you can't size the monthly cost until you go through sales.
ExtractDoc
ExtractDoc (site) automates document extraction generally, not just invoices, and suits teams wanting to test extraction workflows without a credit card. The free tier gives 100 free credits to start. Limitation: paid pricing isn't disclosed on the site, so cost comparison against Invofox's stated $500/month starting price isn't possible until you sign up or contact them. It has the most launch-day traction of the group (8 votes), which may be worth weighing alongside the pricing gap when shortlisting.
How to choose
If budget is the main constraint and your volumes are small, Invoices Reader is the only alternative here with a published price well below Invofox's $500/month starting point. If you need confirmed pricing before you commit, you'll have to contact NexaAlign, OpenEnvoy Extract, or ExtractDoc directly, since none publish paid-plan rates. If accuracy guarantees matter most, compare Invofox's 99% SLA directly against OpenEnvoy Extract's stated 100% accuracy SLA claim before deciding on price alone.
FAQ
Is there a free way to try document extraction before paying? Yes — all four alternatives and Invofox itself offer a free tier.
Which alternative has the lowest confirmed starting price? Invoices Reader, at $3/month, is the only alternative with a published price below Invofox's $500/month.
Why don't the other alternatives list pricing? NexaAlign, OpenEnvoy Extract, and ExtractDoc don't disclose paid-plan pricing on their sites, so you'd need to contact them directly for a quote.