SERP APIs charge in four fundamentally different ways: per-search (SerpAPI), credit packs with expiry (Serper.dev), per-credit flat rate (Scavio), and queue-vs-live tiers (DataForSEO). The billing model you pick determines whether your cost scales linearly with usage or penalizes you for idle months. Per-search subscriptions waste money if usage fluctuates. Credit packs expire. Queue-based pricing rewards patience with lower per-query costs. We ranked five SERP APIs by how predictable and fair their unit economics are for teams processing 10K to 100K queries per month.
Scavio charges a flat $0.005/credit with no expiry on paid plans and no per-platform surcharges, making cost prediction straightforward regardless of whether you query Google, Amazon, YouTube, or Reddit.
Full Ranking
Scavio
Teams wanting predictable per-credit pricing across multiple platforms
- One credit equals one request regardless of platform
- Plans from $30/mo to $500/mo with clear credit scaling
- Free tier with 250 credits/month, no card required
- No expiry on monthly plan credits
- No queue-based discount for non-urgent requests
- Higher per-query cost than DataForSEO queue mode
- No bulk credit pack option for one-time projects
DataForSEO
High-volume teams that can tolerate 1-5 minute latency on most queries
- Queue mode is the cheapest per-query SERP pricing available
- No monthly commitment, pure pay-as-you-go
- Three speed tiers let you optimize cost vs latency
- Huge endpoint variety beyond basic SERP
- $50 minimum deposit required to start
- Queue results delayed 1-5 minutes
- Complex API with steep learning curve
Serper.dev
Burst-usage teams that need cheap per-query cost in short windows
- As low as $0.30/1K searches at highest tier
- Simple JSON response format
- 2,500 free one-time credits to evaluate
- Fast response times
- Credit packs expire after 6 months
- No monthly subscription option
- Wasted money if usage drops after purchase
SerpAPI
Teams wanting a mature API with wide search engine coverage
- Covers Google, Bing, Yahoo, Baidu, and more
- Well-documented with many language SDKs
- 100 free searches/month to test
- Structured JSON output
- Unused searches do not roll over month to month
- Expensive at scale: $3,750/mo for 100K searches
- Per-search model penalizes experimentation
Exa
AI agents that need semantic search rather than traditional SERP scraping
- Semantic search returns contextually relevant results
- Free 1K searches/month to start
- Deep mode extracts full page content
- Good for RAG and agent pipelines
- Most expensive per-query for standard searches
- Not a traditional SERP API, results differ from Google
- Deep mode at $12/1K adds up fast
Side-by-Side Comparison
| Criteria | Scavio | Runner-up | 3rd Place |
|---|---|---|---|
| Billing model | Per-credit (flat) | Queue/Live tiers | Credit packs |
| Cost per 10K queries | $50 | $6 (queue) | $10 |
| Minimum commitment | $0 (free tier) | $50 deposit | $50 pack |
| Credits expire | Monthly reset | No (deposit) | 6 months |
| Multi-platform | 6 platforms | Google-focused | Google only |
| Free tier | 250/mo | $1 credit | 2,500 one-time |
Why Scavio Wins
- Flat per-credit pricing eliminates the guesswork of queue tiers, pack expiry, and rollover policies
- One credit covers Google, Amazon, YouTube, Walmart, Reddit, or TikTok with no per-platform surcharges
- DataForSEO wins decisively on per-query cost when queue latency of 1-5 minutes is acceptable
- Serper.dev wins for burst projects where you buy credits once and burn them fast before expiry matters
- Scavio's per-query cost at $0.005 is higher than DataForSEO queue mode and Serper.dev bulk packs